Page 87«..1020..86878889..100110..»

Category Archives: Evolution

AAIB investigation to Tekever AR5 Evolution Mk 2, G-TEKV – sUAS News

Posted: October 24, 2021 at 11:35 am

While orbiting south of the runway in preparation for landing, both the unmanned aircrafts engines shut down unexpectedly. The External Pilot on the ground, who was visual with the aircraft, took control and landed it without further incident.

The dual-engine shutdown was likely to have been caused by an on-aircraft data error. Various safety actions, including improvements to the aircrafts hardware and software, and the Ground Control Station software, have been taken to reduce the risk of a reoccurrence.

History of the flight

The unmanned aircraft, G-TEKV, was returning to Lydd Airport from a flight over the English Channel. Flight operations were conducted from a Ground Control Station (GCS) where the crew control the aircraft from takeoff to landing and operate the payload to fulfil the mission objectives. The GCS contained two stations, the flight GCS (fGCS) and the mission GCS (mGCS). The fGCS focused on all aspects of the control of the aircraft platform, whereas the mGCS focused on the mission goals and operation of the payload.

The GCS was manned by the Mission Commander (MC), the oncoming Internal Pilot (IP), the off-going IP, and the Payload Operator (PO). An External Pilot (EP)1and a Maintenance Technician (MT) were positioned at the side of the runway abeam the intended touchdown position for the aircraft and both could communicate with the IP through airband radios.

While the aircraft was orbiting off the coast prior to transiting back to the airfield, the two IPs conducted a handover; the off-going IP remained to act as a second pilot to assist with the conduct of the remainder of the flight. Meanwhile the EP advised that the wind favoured a landing on Runway 03 with a light crosswind.

The aircraft transited towards the airfield at 700 ft amsl to remain clear of the cloud and icing. On reaching Echo Point, overhead the airfield (Figure 1), the aircraft entered an orbit while the IP, assisted by the off-going IP, proceeded to load the mission waypoints for a landing on Runway 03.

Meanwhile, the EP reported to the GCS that he could hear the aircraft but was not visual with it. The MC instructed the IP to descend the aircraft to 600 ftat which point the EP confirmed that the aircraft was visual and clear of cloud.With the aircraft established at 600 ft in the orbit at Echo Point and the mission points uploaded, the IP informed the EP that the aircraft was set up for the landing. The EP acknowledged and the IP switched the aircraft to route mode2 to proceed with the approach and landing on Runway 03. After the aircraft completed two more orbits, the crew in the GCS noticed that it did not appear to leave the orbit at the expected point to establish itself downwind.

As the aircraft flew the final orbit, the EP outside was expecting the call downwind from the GCS team. He noticed the aircraft level its wings, as expected when departing the orbit, but observed the nose drop more than normal. At this point the EP became aware that he was not able to hear the aircrafts engines. He operated the throttles and confirmed that there was no engine response. The EP switched to fly-by-wire (FBW)3 mode, took control of the aircraft, confirmed control response, and instructed the MT to inform the GCS about the complete loss of engine power.

While this was happening, the flight team in the GCS was first alerted that something was amiss when they observed the aircraft fly on a westerly heading towards the runway and not along the expected track to establish itself downwind parallel to the runway.

None of the team reported seeing or hearing any alarms or warnings. The MC noticed that the height of the aircraft appeared low, and the off-going IP then noticed that the displayed parameters for both engines indicated zero rpm.

The MC, unaware that the EP had already taken control of the aircraft, gave instructions to the IP to advise the EP to do so and went outside the GCS to observe the aircraft. The MT advised the IP that the EP had already taken control and so, from that point on, the IP provided speed information to the EP until the aircraft had landed.

The EP assessed the conditions and positioned the aircraft on final approach; it landed without further incident.

June 2020 event

This event followed a related one that occurred in June 2020 where, during an integration ground test of equipment onto a new AR5 aircraft at the manufacturing and development site in Portugal, both engines shut down, uncommanded by either the GCS or the EP.

Full report here

Read the original post:

AAIB investigation to Tekever AR5 Evolution Mk 2, G-TEKV - sUAS News

Posted in Evolution | Comments Off on AAIB investigation to Tekever AR5 Evolution Mk 2, G-TEKV – sUAS News

The evolution of local networks: This is how the c’t editors networked – Market Research Telecast

Posted: at 11:35 am

Compared to the pioneering days of networking, todays publisher-wide WLAN and Gigabit Ethernet networks are almost boring: Thanks to the full-time care of our admin colleagues, both work just as smoothly as the gigabit fiber optic connection to the Internet, via which all of our companys media c t, heise online, iX, Mac & I, Technology Review, Make and whatever they are called find their way into the public eye.

It was already clear in 1983, in the year the ct was founded, that a network infrastructure had to be set up. However, the term was not even thought of by the professional admin at the time. The first three editorial colleagues, editor-in-chief Christian Persson, his deputy Detlef Grell and first editor Andreas Stiller, had to design the network in parallel to the editorial work and also set it up themselves.

A shared printer was needed to print out and proofread manuscripts, and file sharing was needed to get contributions from the MS-DOS platform of the time to Macs. On the Macs, the DTP department created the printing documents with the Quark XPress layout software. It quickly became clear that printer and file sharing services would speed up work considerably.

Thought and done. This is how the first network specification, called the Turnschuhnetz, came about: the editorial teams only printer was enthroned on a mobile pedestal in the form of a tea trolley that rolled from desk to desk as required. The manuscript files were written on floppy disks and the several meters distance between the editorial office and the DTP was overcome using sneakers. On the Macs, a converter program grabbed the manuscripts and converted the DOS umlauts, quotations and line breaks to their Mac counterparts.

The floppy disks used initially had a capacity of 360 kilobytes and the maximum transfer speed of the sneaker network was around 6 kbytes per second. However, the editors hardly ever exhausted the capacity, the manuscripts often only took up a few kBytes on the floppy disk. Experts estimate the effective transmission speed to be around 0.05 kByte / s. That didnt change later when the capacity of the floppy disks doubled.

The replacement of the sneaker network was indicated when the first editors with Mac specialization joined the growing editorial team at the end of the 1980s due to lack of space, the Macies moved into an adjoining room in the eastern part of the building and self-deprecatingly founded an AppleTalk segment called the Ostzone.

This first editorial network demanded as much respect as it demanded ridicule: AppleTalk was as slow as a snail with at most 230.4 kBit / s. The first generations of ARCNET or Ethernet networks already reached the megabit level. ARCnet achieved a maximum of 2.5 Mbit / s, Ethernet up to 10 Mbit / s.

At the beginning of the era of local area networks, the word compatibility must have been missing in the guidelines of Apple and Microsoft developers, at least Macs could not talk to PCs by default. This required expensive additional software such as DAVE for MacOS.

But every Mac came with most of the networking hardware out of the box. For actual networking, you only needed an adapter box, which Apple offered in the USA for just 50 US dollars around 90 euros today, adjusted for inflation. For other network technology you had to shell out a multiple of it. An AppleTalk segment could be up to 300 meters long and connect up to 32 nodes (Macs and printers). And even back then Apple showed with AppleTalk what the company wanted in terms of user comfort: An AppleTalk network required maintenance in the blink of an eye. It was enough to plug the network cable into a free adapter socket. The Mac automatically received an address and was ready to transfer data.

However, Apples pretty idea was not of practical importance for the editorial team. The sneaker network was only replaced at the end of 1992 by 10Base2, one of the first Ethernet generations.

Disclaimer: This article is generated from the feed and not edited by our team.

Read more:

The evolution of local networks: This is how the c't editors networked - Market Research Telecast

Posted in Evolution | Comments Off on The evolution of local networks: This is how the c’t editors networked – Market Research Telecast

Total Mayhem Games on the evolution of Games with Gold success story, We Were Here – TrueAchievements

Posted: at 11:35 am

We Were Here Forever has just been given a release window of Q2 2022, along with more information about the series' return to Castle Rock in this fourth instalment. Total Mayhem Games' co-founder and managing director, Lucia de Visser, and producer, Geoff van den Ouden, took the time to answer some of our burning questions about the mystery-filled co-op puzzle games inspiration, achievements, walkie-talkies, and more await...The first game in the series, We Were Here, initially launched onto PC in 2017, followed by We Were Here Too in 2018. In September 2019, Total Mayhem Games decided it was time to bring We Were Here to the Xbox platform. "We Were Here is a unique game series and practically a genre on its own. We really loved bringing the series to Xbox, but we also knew that because of its uniqueness we should make an effort to offer people a glimpse or taste of what the series is about," says the duo. "Fortunately, Xbox felt the same way and we came up with a joint strategy to get the Xbox community acquainted with We Were Here." The collaboration between the companies saw We Were Here enter as a Games with Gold title. "Within the first week, over a million people had downloaded We Were Here and players who had never heard of our franchise before, suddenly found this really fun co-op series to play with a friend. So yeah, it was really great to offer We Were Here to the community through Xbox Games with Gold."

The popularity of the series is due to the unique gameplay it offers, and just like any great game, inspiration was key in laying the foundations for things to come. "Weve always loved games like Myst, Portal 2, and Keep Talking and Nobody Explodes. However, the thing that really got us on track to create an asymmetric puzzle game was some user tests we did with actually locking people up in a room with puzzles." This was the lightbulb moment that would later spawn the walkie-talkie mechanic for which the series is known, and the reason that players are split up when attempting to solve puzzles. "During these tests, we noticed that the experience was even more intense when the players werent physically in the same room and had to describe things to each other in order to help their partner progress or escape. That became the basic principle of the We Were Here series."

"At Total Mayhem Games we love the mystery around We Were Here, and we love that we have a fanbase that is actively trying to figure out what is going on in this castle," they say. "Our audience deserves more clarity on the narrative and what goes on in this creepy place." Those of you with a keen interest in the series might have worked out that the Jester in the trailer is a direct reference to We Were Here and We Were Here Too. You would be correct in that assumption, as We Were Here Forever tells the story of the explorers left behind in the first two games the return to Castle Rock doesn't mean there isn't plenty of mysterious goodies to uncover. "In We Were Here Forever, every player will get a far better idea of what is going on in Castle Rock," says the pair, also teasing "a special treat for the troopers that try to explore and retrieve all of the lore."

The walkie-talkie mechanic is a staple in the We Were Here series. It's the number-one most important feature that ensures you and your partner can communicate when solving puzzles. You can of course use Xbox Live Party Chat to easily chat to your partner, but that's no fun the walkie-talkie offers the most realised experience for the game, plus you get to say 'over' at the end of every sentence. "Once we had decided to make an asymmetric co-op puzzle game, we had two challenges: People had to communicate with each other while they werent in the same space, and we wanted to add a bit of tension and difficulty to the whole talking mechanism," they say. "It really gives you the feeling that you are an explorer trapped in a creepy castle with the walkie-talkie being your last resort, instead of you just playing some video game with a buddy from the comfort of your own home."

While the team creates achievements for the more casual players, it's important to them to create a list that caters to fine folks like yourselves that often want to unlock everything. "The 'I want to explore and do it all' player is the more interesting one to create achievements for. We love to reward them for all the extra effort they put into the game, but also, we dont want to make it too easy." When looking at the completion times here on TA for the three currently available games, you can see that Total Mayhem has consistently worked to add extra value with each title. We Were Here kicked off the series with a one-to-two-hour completion time, followed by We Were Here Too's two-to-three-hour estimate, and ending with We Were Here Together, which jumps right up to around six-to-eight hours. "We actually have a few speedrunners and achievement hunters in our beta crew who help us determine what would be the best pace to earn certain achievements. On top of that, we love to tease you to understand more of the mystery of Castle Rock in order to really get to 100% completion."

We Were Here Forever is set to launch sometime during Q2 2022, and you can be sure that we'll let you know when we have a solid date for it. Have you enjoyed the series so far? Excited for the next chapter? Let us know!

See more here:

Total Mayhem Games on the evolution of Games with Gold success story, We Were Here - TrueAchievements

Posted in Evolution | Comments Off on Total Mayhem Games on the evolution of Games with Gold success story, We Were Here – TrueAchievements

NETS 2021: The evolution of the Brooklyn fan now 10 seasons on – NetsDaily

Posted: at 11:35 am

On Tuesday night in Milwaukee, the Nets will open their tenth season as Brooklyns team, then after a short stop in Philadelphia, theyll be back at Barclays Center for Opening Night. There, its expected a full house, 17,732 fans, will greet them and hope this is it. Waiting till next year, that tired Brooklyn slogan that began with the Dodgers. will finally have reached its expiration date.

As Ian Eagle told reporters earlier in the week on a YES Network conference call, the Brooklyn Nets fan has evolved and matured, literally as well as figuratively.

From my perspective, everything has been trending up, Eagle said. The move to Brooklyn was a mystery for many of us that were holdovers from New Jersey because we had no idea how the team would be embraced. And each year, weve seen this buildup of interest.

Now this 10-year period youre talking about, its a generation, potentially, of fans, kids that were 5, 6, 7 years old that are now 15, 16, 17 and have basketball opinions and have formed a passion for this team. Ive seen it. Ive seen it being around the arena.

So has Sopan Deb who writes of that transition in his Nets season preview for Sundays New York Times.

I really feel like this is the final act in the renaissance of Brooklyn and giving Brooklyn its rightful place in the world, and that has tremendous importance for the city going forward, Mayor Bill de Blasio, a longtime Brooklyn resident, told Deb last June while sitting courtside at Barclays Center. He was talking about a hoped-for championship last year, but the words will work just as well in 2021-22.

Getting there, as Deb writes, has been a long journey, filled with angst on the court and off (We see you, Kyrie, or maybe we dont.) When Barclays Center finally opened for that first season, after nearly a decade of shifting politics, undercapitalization then a rescue by an unlikely champion in the person of a Russian oligarch, ownership didnt know what to expect.

We didnt have a fan base for New York or Brooklyn at all, said Irina Pavlova, then a top executive in Mikhail Prokhorovs ONEXIM holding company. It was zero. It was starting from scratch, especially in a city like New York, where the Knicks are such an institution.

So, even though the team held trademarks for both New York Nets and Brooklyn Nets (still do), Pavlova said they went with Brooklyn, even creating what is now the teams unique chant, Brooook-lyn, (trying it out for the first time in a preseason game in of all places, Atlantic City.)

Now, as Eagle said and Deb wrote, the Nets have their own native fans. The Brooklyn-as-cool theme worked and as the Brooklyn Brigade, the 96 of the most loyal fans, proves, is its manifestation in the arena Section 114 in the past, Section 1 from now on.

A motley crew if there ever was one, their unifying principles are loyalty to the team ... and creativity, Brooklyn creativity, in putting together made-for-TV chants. The group isnt limited to Brooklyn residents. New Jersey, Staten Island and Long Island are represented, too, but its very much Brooklyn, or Brooook-lyn.

Deb interviews several of them, starting with its founder, a Brooklyn-born Nigerian-American investment banker with a degree from Harvard and as good an understanding of Brooklyns essence as the original marketers. He is what they hoped for.

You can travel the whole world and youre not going to find people more proud of where theyre from than New Yorkers, and I think that goes especially so for people from Brooklyn, Edemeka said.

At first, Edemeka mined the comment section of NetsDaily offering tickets to games, tickets he paid for. He was about Brooklyn, not so much the Nets.

I dont have any of that emotional baggage, Edemeka told Deb talking about what came before in New Jersey. I didnt live through 12 and 70. Im unburdened by that legacy.

Deb also introduces his readers to those other denizens of the Block, where the Brigade hangs, as well as others around the building. Theres Giovannie Cruz of Elizabeth, N.J. who admits that he had to take a long walk after the Game 7 overtime loss to the Bucks. I didnt want my son to see me too animated and use too much colorful language.

And Dawn Risueno who splits her loyalties between the Nets and Yankees and annually makes road trip across country with her husband, keeping in touch with her Brooklyn-based family of fans that now includes seven grandchildren as well as her two children.

They didnt have a choice in the matter, Risueno told Deb, speaking of her children and grandchildren. Since they came literally out of the womb, Ive had them in Nets outfits.

Theres also Richard Bearak, who works with the likely future mayor, Eric Adams at Brooklyn Borough Hall. He was at the last Nets championship game, out on Long Island, when the New York Nets won the ABA championship in 1976 with Dr. J, Julius Erving, leading them. He has literally seen it all.

When Barclays first opened to the public, Bearak told the Times, the arena was a tourist attraction that drew fans of winning, opposing teams.

A third of the crowd could have been supporting Golden State, Bearak, 63, said. At Madison Square Garden, its really hard to be a fan of another team and expect to be there in droves.

Now, thats changed as anyone who sat through the pain of Game 7 back in June knows. Ian OConnor of the Post who attended his fair share of big games at Madison Square Garden, wrote that even the most vaunted Garden crowds were never louder. Afterwards, those same fans, a little subdued, filled the entrance plaza and side streets, wishing each other well until the next time, so many of them wearing black-and-white (which is now the second best selling team gear in the NBA. Not bad or a team that was 31st back in New Jersey, behind the defunct Seattle Supersonics.)

There is, as always in any story on Nets fans a growing genre by the way mention of the competition between the two New York teams, the other one being the New York Knicks who play in another borough, Manhattan. There are enough metrics to argue convincingly that the Nets are moving on the Knicks. But John Abbamondi, the CEO of the Nets and BSE Global, Joe Tsais holding company, thinks while that competition is nice, it may soon become passe.

We dont want to be just the most popular N.B.A. team in New York City, Abbamondi told Deb in an interview at Barclays before that Game 7. We want to be a global sporting icon on the level of a Real Madrid or Barcelona. Thats our aspiration.

Fans, of course, would be happy with just the Larry OBrien Trophy.

Read more from the original source:

NETS 2021: The evolution of the Brooklyn fan now 10 seasons on - NetsDaily

Posted in Evolution | Comments Off on NETS 2021: The evolution of the Brooklyn fan now 10 seasons on – NetsDaily

Amid auto show evolution, Ford hosts ‘immersive’ pop-up in Texas – The Detroit News

Posted: at 11:35 am

Ford Motor Co. this week is bringing its portfolio of buzzed-about new vehicles including the all-electric F-150 Lightning, Bronco and Mustang Mach-E to the streets of downtown Austin, Texas, for what it's describing as an "immersive" pop-up experience for consumers.

The free 10-day event, which kicked off Friday and runs through Oct. 24, is yet another example of automakers finding new ways to get their product in front of prospective customers beyond reveals and displays at traditional auto shows.

Auto companiessee such opportunities for consumers to experience new vehicles as keyas they transition to technologically-advanced electric vehicles that may be new to many drivers. And the COVID-19 pandemic, which resulted in cancellations of many of the majorauto shows over the last year and a half, accelerated some of these changes as event organizers looked to outdoor events as safer alternatives to more traditional formats and automakers grew accustomed to revealing new cars virtually.

Last month, for example, the Detroit Auto Dealers Association hosted an outdoor auto event called Motor Bella that served as an alternative to the North American International Auto Show, canceled two years in a row because of the pandemic, and which focused on giving consumers the chance to experience new vehicles and technologies via cruises, off-roading demonstrations and laps around the race track. DADA plans to incorporate such experiences into the Detroit auto show, which is expected to return to the city next fall.

Automakers also see events such as Ford's "Built to Connect" in Austin as a way to introduce consumers to new vehicles they may not be able to findon dealer lots that have been left bare in recent months due to supply-chain issues.

"Consumers, when they have a chance to not only ride in them but maybe do something a little different ... they can see how that vehicle fits better into their lives," Raj Register, head of global brand experiences for Ford, told The Detroit News. "That's why we prioritized this, to give consumers an idea of what Ford has to offer, as well as thinking about all the reveals and launches that we've had over the last year during this pandemic where we had to reveal things virtually. This is also an opportunity for us to carry on that excitement, especially with some of our iconic vehicles like Bronco."

The Austin event is organized around three themes: Built to Electrify, Built Wild and Built Tough.

The Built to Electrify exhibit highlights Ford's electric vehicle portfolio, including the forthcoming F-150 Lightning as well as the Mustang Mach-E, which launched late last year and is the Dearborn automaker's first fully-electric vehicle. Attendees have the opportunity to participate in a zero-to-60 ride in the Mach-E.

In the next nine to 10 years, almost 50% of our portfolio will be electric vehicles," said Register. "And many of the consumers that we have now reserving vehicles and even purchasing vehicles are new to the brand."

The Build Wild demonstration puts consumers in the passenger seat of Ford's resurrected Bronco so they can experience the SUV's off-road capabilities via drives through sand andwater and up a hill.

Built Tough highlights Ford's truck lineup, including its new Maverick compact pickup and various F-150 models. It includes a trailer tow assist demonstration.

This isnt for everyone, but we do think that a lot of people are looking to engage with the vehicles very differently, versus just going and seeing something static," said Register.

Still, she said, Ford doesn't view thistype of event as a replacementfor more traditional auto shows:We see as a complement. Our goal is not to replace auto shows. This is a way for us to meet consumers where they are.

Ford selected Austin for the event, she said, in part because the automaker has a strong dealership network in Texas. The company recently announced it would spend $90 million in Texas as part of a broader $525 million investment over the next five years in auto technician training.

Depending on how the Austin event goes, Ford could look to expand the concept to additional markets in the future, Register said.

jgrzelewski@detroitnews.com

Twitter: @JGrzelewski

Go here to see the original:

Amid auto show evolution, Ford hosts 'immersive' pop-up in Texas - The Detroit News

Posted in Evolution | Comments Off on Amid auto show evolution, Ford hosts ‘immersive’ pop-up in Texas – The Detroit News

What will animals of the future look like? We asked 7 scientists. – Vox.com

Posted: October 21, 2021 at 10:21 pm

While it can sometimes seem like humanity is hell-bent on environmental destruction, its unlikely our actions will end all life on Earth. Some creatures are sure to endure in this age of mass extinction and climate crisis. Over time, they will adapt to a harsher world weve helped create, evolving to meet the moment as best they can.

Some of these transformations have gotten underway in our lifetimes. Climate change, some research suggests, is already shape shifting animals shrinking certain migratory birds and speeding up the life cycles of amphibians, for example. No one knows exactly what changes to plants and animals will transpire in the years to come. Still, evolutionary biologists say its worth trying to imagine what creatures will evolve in the future.

I do think its a really useful and important exercise, Liz Alter, professor of evolutionary biology at California State University Monterey Bay, says on the latest episode of Unexplainable, Voxs podcast about unanswered questions in science. In thinking about the animals of the future, Alter says, we must consider how were changing the environment now. Its a very sobering thing to think about the long future, she says.

I spoke to several evolutionary biologists and paleontologists who, along with Alter, helped me imagine what animals might exist one day say, millions of years into the future and how our actions could spur their arrival. At the very least, its reassuring to know that life almost certainly will find a way, with or without us.

But it may never be the same.

What animals are likely to exist tens of thousands, or even millions of years from now?

Thats the big question I posed to everyone I spoke with, and their responses fell along three main lines of thinking.

Some started off by thinking about which animals alive today are most likely to endure human-caused climate change and mass extinction. (Scientists have identified five major extinction events in natural history, and many say we are living through or on the cusp of a sixth one now, caused largely by human activity.) Others began by imagining the potential environments of the future, and what adaptations might lead creatures to survive in them. A third group thought about the deep history of life on Earth, and what types of animals that used to roam the planet might return, in new forms, long after we are gone.

First off, the survivors: These are rats, rodents, and also things like cockroaches and pigeons, said Jingmai OConnor, a paleontologist at the Field Museum in Chicago. These animals are doing just fine despite the worst that were doing to this planet.

If these species survive the ecological changes that are occurring now, they might also evolve to fill ecological space left behind by extinct animals. For instance, if tigers go extinct in the next million years, perhaps flightless, carnivorous pigeons and rats will grow to the size of ostriches and snack on the animals that tigers once ate. Its impossible to predict which specific adaptations might emerge in which animals, but its clear that as some species die off, they leave a gap in the food chain that can be filled by other species.

In the far, far future, rodents are especially well poised to thrive if mammal species continue to go extinct. By introducing rats everywhere weve settled, humans have increased the genetic diversity of rats, which makes them more adaptable to their surroundings. More genetic diversity means potential solutions to different [environmental] challenges they might face, says Alexis Mychajliw, a paleoecologist at Middlebury College. Already, scientists have noted rats evolving adaptations to thrive in specific cities, like New York. They might even be able to further adapt to living amid heavy metal pollution and radioactivity, or to be able to eat toxic waste, Mychajliw says.

And if life on land grows too harsh, rats may be able to slowly adapt to water. Perhaps their evolutionary descendants will lose their fur or sprout flippers, developing streamlined bodies suited for a fully aquatic existence. Other marine mammals, like seals and whales, have followed this path in their transition from land-dwelling creatures to aquatic ones.

Again, these specific evolutionary paths are pure speculation. But experts say theyre within the realm of possibility.

The second way to think about animals of the future is by imagining the environments of the future. Environments can drive evolution by exerting selection pressure, favoring some traits over others. For example, some birds have evolved long, pointy beaks to draw nectar out of flowers.

If anything, there will likely be plastic in the environment well into the future. Of all the elements that humans have introduced into the environment, plastic waste is already ubiquitous, and remnants of it might linger for millennia if humans go on producing it as we have. Plastic is a big source of carbon, which all living things depend on, said Sahas Barve, an evolutionary ecologist at the Smithsonian National Museum of Natural History. Plastic, he added, could become food, and any animal that can exploit that will be successful.

In a way, this development would kind of go full circle: Many plastics are made from petroleum, which is called a fossil fuel precisely because it derives from ancient, transmogrified plant and animal remains. So new life forms could learn to eat the leftovers of really, really old ones.

Termites could be one such critter. These insects already have a gut microbiome a collection of microorganisms that help with digestion that breaks down cellulose. Like plastic, cellulose is made of a complex carbon polymer, so its not a stretch to imagine termites adapting to break down another polymer like plastic.

I could easily imagine them evolving a microbiome that helps them then digest plastic, Barve says. Some fungi and bacteria, including some found in the stomachs of cows, are already able to break down plastic.

The distant future is also likely to be more watery, as sea-level rise decreases the portion of the planet covered by dry land. In envisioning a world of rising seas and altered coastlines, some scientists think about how certain animals might take to living in more marine environments.

Sharlene Santana, a professor of biology at the University of Washington, considers how a bat species might evolve to live off of, and around, the oceans. She imagines a bat with a six-foot wingspan taking shape, capable of gliding like an albatross instead of flapping its wings, perhaps covering hundreds of miles in search of food or islands to roost. It might use finely-tuned echolocation to sense ripples in the water in order to detect fish. (In fact, some bats already do this.)

This bat is doing something that bats cannot do today, which is to sail and soar on ocean air currents for very long distances, Santana says. I call it the sailing bat.

Many of the scientists who spoke to Vox imagined a future environment where humans are no longer around. In doing so, they often drew from animals that existed on Earth before our time perhaps these types of creatures could make a return down the line.

If humans were to go extinct, our carbon emissions could still remain in the air for a long time, Alter, the Cal State professor of evolutionary biology, said. That could lead to boom times for plants, some of which can thrive in a CO2-dense atmosphere.

The increased density and diversity of plants, in turn, might eventually increase the concentration of oxygen in the atmosphere. Researchers have hypothesized that the growth of insects depends in part on the concentration of oxygen in the atmosphere, which could lead to insects developing larger bodies, Alter says. So a future, oxygen-rich world is one that might be able to foster rabbit-sized praying mantises, or ants as large as hummingbirds and dragonflies as large as hawks, Alter said.

It sounds extreme and these visions of the future are merely educated guesses. Then again, something like it has happened before: About 300 million years ago, in the Carboniferous era, the atmosphere was more than 30 percent oxygen, compared with 21 percent today. The fossil record reveals that insects around that time were far larger.

Mairin Balisi, a paleoecologist at the La Brea Tar Pits in Los Angeles, thinks about what type of apex predators might rise to the top of the food chain if humanity does blink out. To that end, she considers what predators existed before humans.

When we think about large predators in North America alone, we think of the gray wolves, the mountain lion, or the grizzly bear, Balisi says. But large predators on the continent were much more common up until around 12,000 years ago, during the Pleistocene epoch or most recent Ice Age, with many species of saber-toothed cats and bone-crushing canines roaming the land.

In a future world devoid of human beings, Balisi speculates, such large predators might be able to evolve once again. She is most confident about the saber-toothed cats, whose long, sharp teeth and bulky limbs evolved independently multiple times in the last 40 million years. If some lineage of felines persists eons into the future, history could very well repeat itself.

Modern humans have only been around a few hundred thousand years, but what we do today is likely to have ripple effects for how the natural world looks tomorrow.

The evolution of life depends on the genetic and development toolkit as we know it today, says Santana, the biologist at the University of Washington. Because theres natural variation between animals, some are better at competing for resources and surviving, with the least helpful traits tending to fizzle out, while others crop up with new adaptations. As species continue to go extinct, whether due to habitat loss, agriculture, poaching, or human-caused climate change, many potential sources of diverse life are extinguished from the future, too.

Scientists can still imagine a world where animals that are endangered today carry on and start new branches on the evolutionary tree. The future doesnt have to belong to just the rats, pigeons, and insects. As long as manatees, polar bears, and monarch butterflies are around, for example, there remains the possibility of their descendants entering the picture sometime in the future.

All of which is worth thinking about if we are to take full responsibility for our role in shaping what the planet will look and feel like long after were gone. When we imagine what creatures could come next, we can ask ourselves: What future do we want for the planet? How hard are we willing to work so that future generations of humans are still around to live alongside it?

Giant bugs evolving in the future would be really, really cool, Alter said. Especially so, she added, if humans are actually around to see them.

In the meantime, while its heartening to imagine how different species might bounce back in millions of years, you dont want to stop investing in the life thats around us today, said Mychajliw, the Middlebury paleoecologist. Theres a lot we can do right now to ensure that we protect species, protect their genetic diversity, and protect their ability to respond to change.

Read the original post:

What will animals of the future look like? We asked 7 scientists. - Vox.com

Posted in Evolution | Comments Off on What will animals of the future look like? We asked 7 scientists. – Vox.com

The evolution of Black beauty – harpersbazaar.com

Posted: at 10:21 pm

It's long been overlooked, but it's now impossible to deny the huge global impact that Black beauty has had over the past century. For too long, so many have been quick to either trample on, take credit for, or just completely ignore the efforts of Black creators, artists and business owners. It's been exhausting and caused ruptures across the beauty industry.

Growing up in a predominantly white area, my Blackness stuck out, making me immediately different. This was made ever more obvious by the lack of products available for my skin. Each Saturday shopping trip with my school friends would see them picking up a host of different foundations and concealers, whereas my experience always left me empty handed.

After a taxing year for Black and ethnic minorities in 2020, the UK governments Commission on Race and Ethnic Disparities determined that structural racism in the UK does not exist, although outright racism still persists. The commission focused on education, but it's undeniable that racial bias exists within many major business structures - including the beauty industry.

A Guardian article last year stated that Black business owners often face greater difficulty in getting access to the funds necessary to keep their enterprise afloat and are twice as likely to have loan applications rejected in comparison to white business owners. This prompted eight UK-based Black-owned beauty brands to collaborate on the #pullupchallenge, and ask the beauty industry to do better in making sure to give Black-owned businesses a seat at the table.

Slowly, more Black-founded and Black-owned beauty brands are getting the recognition they deserve with help from initiatives like UOMA Beautys Pull Up For Change, by Sharon Chuter, which uses its Small Business Fund to support Black businesses.

The beauty industry has made huge leaps in recent years in terms of diversity and inclusion. When you browse any high-street store your eyes are now met with a plethora of shades to suit just about every skin tone. But, while its always encouraging to look ahead - and there is still a lot of work to be done - its important to look back at how Black beauty has evolved to lead us to this moment.

The idea of a monolithic beauty ideal is so far from realistic

Most of the Black-owned beauty founders I spoke to launched their brands from a need to make space. How do I create a space that is safe for everyone? How do I change this monolithic view of beauty and make beauty varied? Chuter questioned. Shes right the idea of a monolithic beauty ideal is so far from realistic. In fact, even the term, Black beauty is reductive, whereas it actually encompasses a broad spectrum of skin tones, hairstyles, and textures. Emolyne Ramlov, founder of beauty brand Emolyne echoes Chuter, telling me, I also felt majorly underrepresented as someone from an African heritage where the majority of the beauty market is focused on more of a one-size-fits-all notion in terms of colour.

Despite the fact that the number of Black-owned brands we see on shelves today has increased rapidly, many of the founders have faced distinctly similar challenges to get there as Black entrepreneurs. Dr Esho, founder of Esho Cosmetics tells me, In many ways I have felt like a unicorn isolated. Stats show it's harder to get venture capital investment for Black-owned companies. Our brands often do not meet the criteria for investment, so you have to wonder why that is. Make-up artist Joy Adenuga concurs, saying, the major challenge from the beginning, and still is a challenge, is race. Ive lost count of how many opportunities were presented my way but got taken away once theyve realised Im Black. These words hit me with a sharp sting; this feeling of being judged on race is all too familiar.

With these brand founders all having faced such specific challenges, it would be naive to put this down to coincidence.

What in the talcum powder was on your face in the Nineties?! Chuter exclaims. The 1990s was really the birth century for ethnic make-up brands. The first pioneering Black beauty brand was Fashion Fair, which launched in 1973 in America, at a time where Black women were mostly neglected and discounted in popular culture. The brand broke new territory; before, there was no way of finding foundations with darker shades, and many people who were darker used formulas with ground-up chalk and unsafe ingredients. The Nineties saw a boom of ethnic aisles in American drugstores thanks to the popularity of supermodels including Naomi Campbell and Iman, but these were often pushed to the back of shops, and there were no luxury offerings. Chuter tells me: If you wanted to be Black-owned [in the Nineties], you had to be cheap. Even the bigger brands would make products for darker skins that looked - and were - cheap, as if that was the way they thought they would get to us.

However, its fair to say that the aesthetic Black women were aiming for was far more chic than cheap. Adenuga describes the Black make-up trends in the Nineties as a predecessor for what we now refer to as a natural, soft, glam look. She continues: Celebrities like Lauryn Hill, Halle Berry, Naomi Campbell and Aaliyah wore more understated lip shades likes plums and browns, naturally thick eyebrows and more of a subtle smoky eye. Liha Okunniwa, founder of Liha, adds that the look was about always making sure you are glowing from head-to-toe. Glowing skin, now, is universally considered the Holy Grail. But during the Nineties, there was still a severe lack of shades for all, with Okunniwa noting that she had to use a dark brown eyeliner for her lips during the decade.

Then came the Noughties, which really saw its own evolution within the Black beauty sphere. Emolyne tells me: Pat McGrath has always been a driving force, but especially in this era when she won the LOreal Pro-V Makeup Artist of the Year award two years running. Pat McGrath Labs, the brand from the iconic British make-up artist, was one of the most highly anticipated releases of the decade, with sleek, luxury packaging and inclusive shades really raising the bar in the wider beauty industry. Adenuga describes the look of the Noughties as a bit more glam, playful and experimental. Were talking emerald green and blue eyeshadows, thinly plucked eyebrows and heavily glossed lips lined with a brown or plum liner. McGrath's products really provided all the tools for this look, and Black women didnt have to compromise on quality.

Keisha East notes one of the biggest transformations to the beauty world was the inception of Fenty Beauty in 2017. It changed the game again, making it super accessible to find all types of shades in mainstream stores. Upon its creation, it was announced that Rihannas eponymous brand would be releasing 40 shades of foundation. Until this point, many brands would release around half of that number with just three or so darker shades, under the assumption that either darker skin tones would have to fit into this one-size-fits-all, or go elsewhere. Since then weve seen a dramatic push to incorporate more deeper tones into foundation lines across the board.

Theres no such thing as multicultural beauty," Chuter feels - it should be a given that 'beauty' is inclusive of difference by its very nature. Instead, she suggests, we should call out brands as monocultural if they aren't welcoming of diversity.

In order for something to be truly inclusive, it has to start from the inside. Beauty companies must have diverse teams so that this change is organic, and theyll be able to point out the specific flaws in shades and products before they hit shelves.

The beauty world has come on leaps and bounds, but lets face it, theres still work to be done - and its not just on Pat McGrath and Rihanna to pioneer the changes. Chuter is right, the world is a bad place only because were unwilling to accept each others differences. So let's get accepting; we can't stop now.

Pro Filt'r Instant Retouch Concealer

19.00

Badass Icon Concentrated Matte Lipstick

Sublime Perfection Foundation

Ivory Shea Butter,

22.00

Continued here:

The evolution of Black beauty - harpersbazaar.com

Posted in Evolution | Comments Off on The evolution of Black beauty – harpersbazaar.com

RJ Barretts defensive development next phase in evolution with Knicks – New York Post

Posted: at 10:21 pm

From Julius Randles 35-point outburst to Evan Fourniers red-hot shooting in overtime, Kemba Walkers Knicks debut to the collapse in regulation, Obi Toppins explosions in transition to Mitchell Robinsons monster night in the paint, there was so much to break down from Wednesday nights regular season-opening double-overtime win over Boston.

RJ Barretts performance was somewhat lost in the shuffle to most observers. But not to Tom Thibodeau, the Knicks defense-first coach.

RJ in the second half was a monster, Thibodeau said.

After a quiet first half, Barrett was one of the best players on the floor. He scored all 19 of his points in the second half and the two overtimes. He didnt commit a turnover, blocked two shots and hit three 3-pointers.

But what really stood out wont appear on a stat sheet. It was his defense against Celtics All-Star wing Jayson Tatum, limiting the rising superstar to a nightmarish 7-for-30 shooting performance. While Tatum did miss some shots he normally makes, Barrett limited his ability to get to the basket and forced him onto the perimeter. In the final seconds of the first overtime, the Celtics isolated Tatum against Barrett, who smothered him and forced the 6-foot-8 forward into a tough baseline turnaround jumper that he missed badly.

I put on a couple of pounds, Barrett said recently. Just trying to be a little heavier, especially since I will be guarding a key guy most every night. So its just to have that strength, hold my weight there, hold myself down against the other competition.

I feel like Im trying. Im trying to do something out there, trying to just be better, trying to be that guy for our team.

It is part of his evolution as a player. Last season, Barretts improvements on the offensive end he shot 40.1 percent from deep and averaged 17.6 points per game helped the Knicks reach the postseason after an eight-year hiatus. Early on Wednesday, his offense wasnt there. He attempted just three shots in the first half, missing all of them. He wasnt really involved offensively, somewhat lost surrounded by more offensive-minded guards in Walker and Fournier.

But in the third quarter, as the ball began moving more, Barrett got hot. He scored 14 points in the stanza, keying a 25-8 Knicks run that turned a seven-point deficit into a 10-point lead early in the fourth quarter.

The thing I liked the most was that he kept his composure, he wasnt rattled, and he kept playing until the game got going his way and that was good to see, Thibodeau said.

One of the big questions for the Knicks this season is at the defensive end, where they were so strong a year ago. Thibodeau and Julius Randle spent most of the preseason stressing the importance of defending, now that the Knicks might be better offensively with the additions of Fournier and Walker.

Their go-to wing defender last season was Reggie Bullock, who they let walk in free agency to upgrade at the other end of the floor. That left a hole defensively, though. The league is loaded with elite offensive wings, players who will test Barretts defense. There, however, arent many as talented as Tatum.

On opening night, Barrett showed he is ready to take on this new role.

Read more here:

RJ Barretts defensive development next phase in evolution with Knicks - New York Post

Posted in Evolution | Comments Off on RJ Barretts defensive development next phase in evolution with Knicks – New York Post

Listen: Scale-to-Feather Evolution Doesn’t Fly – Discovery Institute

Posted: at 10:21 pm

ArchivesSelect Month October 2021 September 2021 August 2021 July 2021 June 2021 May 2021 April 2021 March 2021 February 2021 January 2021 December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 March 2020 February 2020 January 2020 December 2019 November 2019 October 2019 September 2019 August 2019 July 2019 June 2019 May 2019 April 2019 March 2019 February 2019 January 2019 December 2018 November 2018 October 2018 September 2018 August 2018 July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010 February 2010 January 2010 December 2009 November 2009 October 2009 September 2009 August 2009 July 2009 June 2009 May 2009 April 2009 March 2009 February 2009 January 2009 December 2008 November 2008 October 2008 September 2008 August 2008 July 2008 June 2008 May 2008 April 2008 March 2008 February 2008 January 2008 December 2007 November 2007 October 2007 September 2007 August 2007 July 2007 June 2007 May 2007 April 2007 March 2007 February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004

More here:

Listen: Scale-to-Feather Evolution Doesn't Fly - Discovery Institute

Posted in Evolution | Comments Off on Listen: Scale-to-Feather Evolution Doesn’t Fly – Discovery Institute

A mutational hotspot that determines highly repeatable evolution can be built and broken by silent genetic changes – Nature.com

Posted: at 10:21 pm

Weber, S., Ramirez, C. & Doerfler, W. Signal hotspot mutations in SARS-CoV-2 genomes evolve as the virus spreads and actively replicates in different parts of the world. Virus Res. 289, 198170 (2020).

CAS PubMed PubMed Central Article Google Scholar

Sekowska, A., Wendel, S., Fischer, E. C. & Nrholm, M. H. H. Generation of mutation hotspots in ageing bacterial colonies. Sci. Rep. 6, 410 (2016).

Article CAS Google Scholar

Galen, S. C. et al. Contribution of a mutational hot spot to hemoglobin adaptation in high-Altitude Andean house wrens. Proc. Natl Acad. Sci. U. S. A. 112, 1395813963 (2015).

ADS CAS PubMed PubMed Central Article Google Scholar

Trevino, V. HotSpotAnnotations a database for hotspot mutations and annotations in cancer. Database 18 (2020) https://doi.org/10.1093/database/baaa025.

Fong, S. S., Joyce, A. R. & Palsson, B. . Parallel adaptive evolution cultures of Escherichia coli lead to convergent growth phenotypes with different gene expression states. Genome Res. 13651372 (2005) https://doi.org/10.1101/gr.3832305.15.

Ostrowski, E. A., Woods, R. J. & Lenski, R. E. The genetic basis of parallel and divergent phenotypic responses in evolving populations of Escherichia coli. Proc. R. Soc. B Biol. Sci. 275, 277284 (2008).

CAS Article Google Scholar

Riehle, M. M., Bennett, A. F. & Long, A. D. Genetic architecture of thermal adaptation in Escherichia coli. Proc. Natl Acad. Sci. USA. 98, 525530 (2001).

ADS CAS PubMed PubMed Central Article Google Scholar

Fraebel, D. T. et al. Environment determines evolutionary trajectory in a constrained phenotypic space. Elife 6, e24669 (2017).

PubMed PubMed Central Article Google Scholar

Bull, J. J. et al. Exceptional Convergent Evolution in a Virus. Genetics 147, 14971507 (1997).

CAS PubMed PubMed Central Article Google Scholar

Wichman, H. A., Badgett, M. R., Scott, L. A., Boulianne, C. M. & Bull, J. J. Different trajectories of parallel evolution during viral adaptation. Science 285, 422424 (1999).

CAS PubMed Article Google Scholar

Herron, M. D. & Doebeli, M. Parallel Evolutionary Dynamics of Adaptive Diversification in Escherichia coli. PLoS Biol. 11, e1001490 (2013).

CAS PubMed PubMed Central Article Google Scholar

Kram, K. E. et al. Adaptation of Escherichia coli to Long-Term Serial Passage in Complex Medium: Evidence of Parallel Evolution. mSystems 2, 112 (2017).

Article Google Scholar

Notley-McRobb, L. & Ferenci, T. Adaptive mgl-regulatory mutations and genetic diversity evolving in glucose-limited Escherichia coli populations. Environ. Microbiol. 1, 3343 (1999).

CAS PubMed Article Google Scholar

Miller, C. et al. Adaptation of Enterococcus faecalis to daptomycin reveals an ordered progression to resistance. Antimicrob. Agents Chemother. 57, 53735383 (2013).

CAS PubMed PubMed Central Article Google Scholar

Avrani, S., Bolotin, E., Katz, S. & Hershberg, R. Rapid Genetic Adaptation during the First Four Months of Survival under Resource Exhaustion. Mol. Biol. Evol. 34, 17581769 (2017).

CAS PubMed PubMed Central Article Google Scholar

Meyer, J. R. et al. Repeatability and contingency in the evolution of a key innovation in phage lambda. Science 335, 428432 (2012).

ADS CAS PubMed PubMed Central Article Google Scholar

Van Ditmarsch, D. et al. Convergent Evolution of Hyperswarming Leads to Impaired Biofilm Formation in Pathogenic Bacteria. Cell Rep. 4, 697708 (2013).

PubMed PubMed Central Article CAS Google Scholar

Bailey, S. F., Rodrigue, N. & Kassen, R. The effect of selection environment on the probability of parallel evolution. Mol. Biol. Evol. 32, 14361448 (2015).

CAS PubMed Article PubMed Central Google Scholar

Tenaillon, O. et al. The molecular diversity of adaptive convergence. Science 335, 457461 (2012).

ADS CAS PubMed Article PubMed Central Google Scholar

Eyre-Walker, A. & Hurst, L. D. The evolution of isochores. Nat. Rev. Genet. 2, 549555 (2001).

CAS PubMed Article Google Scholar

Wood, T. E., Burke, J. M. & Rieseberg, L. H. Parallel genotypic adaptation: When evolution repeats itself. Genetica 123, 157170 (2005).

PubMed PubMed Central Article Google Scholar

Woods, R., Schneider, D., Winkworth, C. L., Riley, M. A. & Lenski, R. E. Tests of parallel molecular evolution in a long-term experiment with Escherichia coli. Proc. Natl Acad. Sci. U. S. A. 103, 91079112 (2006).

ADS CAS PubMed PubMed Central Article Google Scholar

Weinreich, D. M., Delaney, N. F., De Pristo, M. A. & Hartl, D. L. Darwinian Evolution Can Follow Only Very Few Mutational Paths to Fitter Proteins. Science. 312, (2006).

Bailey, S. F., Blanquart, F., Bataillon, T. & Kassen, R. What drives parallel evolution?: How population size and mutational variation contribute to repeated evolution. BioEssays 39, 19 (2017).

PubMed Article Google Scholar

Long, H. et al. Mutation rate, spectrum, topology, and context-dependency in the DNA mismatch repair-deficient Pseudomonas fluorescens ATCC948. Genome Biol. Evol. 7, 262271 (2014).

PubMed PubMed Central Article CAS Google Scholar

Duan, C. et al. Reduced intrinsic DNA curvature leads to increased mutation rate. Genome Biol. 19, 112 (2018).

Article CAS Google Scholar

De Boer, J. G. & Ripley, L. S. Demonstration of the production of frameshift and base-substitution mutations by quasipalindromic DNA sequences. Proc. Nail. Acad. Sci. USA 81 (1984).

Turner, C. B., Marshall, C. W. & Cooper, V. S. Parallel genetic adaptation across environments differing in mode of growth or resource availability. Evol. Lett. 2, 355367 (2018).

PubMed PubMed Central Article Google Scholar

Lssig, M., Mustonen, V. & Walczak, A. M. Predicting evolution. Nat. Ecol. Evol. 1, 19 (2017).

Article Google Scholar

Hermisson, J. & Pennings, P. S. Soft sweeps: Molecular population genetics of adaptation from standing genetic variation. Genetics 169, 23352352 (2005).

CAS PubMed PubMed Central Article Google Scholar

Barrett, R. D. H., MGonigle, L. K. & Otto, S. P. The distribution of beneficial mutant effects under strong selection. Genetics 174, 20712079 (2006).

CAS PubMed PubMed Central Article Google Scholar

Jerison, E. R. & Desai, M. M. Genomic investigations of evolutionary dynamics and epistasis in microbial evolution experiments. Curr. Opin. Genet. Dev. 35, 3339 (2015).

CAS PubMed PubMed Central Article Google Scholar

Taylor, T. B. et al. Evolutionary resurrection of flagellar motility via rewiring of the nitrogen regulation system. Science 347, 10141017 (2015).

ADS CAS PubMed Article PubMed Central Google Scholar

Mcgee, L. W. et al. Synergistic pleiotropy overrides the costs of complexity in viral adaptation. Genetics 202, 285295 (2016).

CAS PubMed Article PubMed Central Google Scholar

McGrath, P. T. et al. Parallel evolution of domesticated Caenorhabditis species targets pheromone receptor genes. Nature 477, 321325 (2011).

ADS CAS PubMed PubMed Central Article Google Scholar

Sackman, A. M. et al. Mutation-driven parallel evolution during viral adaptation. Mol. Biol. Evol. 34, 32433253 (2017).

CAS PubMed PubMed Central Article Google Scholar

Alsohim, A. S. et al. The biosurfactant viscosin produced by Pseudomonas fluorescens SBW25 aids spreading motility and plant growth promotion. Environ. Microbiol. 16, 22672281 (2014).

CAS PubMed Article PubMed Central Google Scholar

Lind, P. A., Libby, E., Herzog, J. & Rainey, P. B. Predicting mutational routes to new adaptive phenotypes. Elife 8, e38822 (2019).

PubMed PubMed Central Article Google Scholar

Wright, B. E., Reschke, D. K., Schmidt, K. H., Reimers, J. M. & Knight, W. Predicting mutation frequencies in stem-loop structures of derepressed genes: Implications for evolution. Mol. Microbiol. 48, 429441 (2003).

CAS PubMed Article Google Scholar

Kudla, G., Murray, A. W., Tollervey, D. & Plotkin, J. B. Coding-sequence determinants of gene expression in Escherichia coli. Science 324, 255258 (2009).

ADS CAS PubMed PubMed Central Article Google Scholar

Kristofich, J. et al. Synonymous mutations make dramatic contributions to fitness when growth is limited by a weak-link enzyme. PLOS Genet. 14, e1007615 (2018).

PubMed PubMed Central Article CAS Google Scholar

Lebeuf-Taylor, E., McCloskey, N., Bailey, S. F., Hinz, A. & Kassen, R. The distribution of fitness effects among synonymous mutations in a gene under selection. Elife e45952 (2019) https://doi.org/10.1101/553610.

Frumkin, I. et al. Codon usage of highly expressed genes affects proteome-wide translation efficiency. Proc. Natl Acad. Sci. U. S. A. 115, E4940E4949 (2018).

PubMed PubMed Central Article Google Scholar

Fieldhouse, D. & Golding, B. A source of small repeats in genomic DNA. Genetics 129, 563572 (1991).

CAS PubMed PubMed Central Article Google Scholar

Dong, F., Allawi, H. T., Anderson, T., Neri, B. P. & Lyamichev, V. I. Secondary structure prediction and structure-specific sequence analysis of single-stranded DNA. Nucleic Acids Res. 29, 32483257 (2001).

CAS PubMed PubMed Central Article Google Scholar

Merrikh, C. N. & Merrikh, H. Gene inversion potentiates bacterial evolvability and virulence. Nat. Commun. 9, 10 (2018).

Article CAS Google Scholar

Vogwill, T., Kojadinovic, M., Furi, V. & Maclean, R. C. Testing the role of genetic background in parallel evolution using the comparative experimental evolution of antibiotic resistance. Mol. Biol. Evol. 31, 33143323 (2014).

CAS PubMed PubMed Central Article Google Scholar

Blount, Z. D., Barrick, J. E., Davidson, C. J. & Lenski, R. E. Genomic analysis of a key innovation in an experimental Escherichia coli population. Nature 489, 513518 (2012).

ADS CAS PubMed PubMed Central Article Google Scholar

Spor, A. et al. Phenotypic and genotypic convergences are influenced by historical contingency and environment in yeast. Evolution (N. Y). 68, 772790 (2014).

Google Scholar

Orr, H. A. The probability of parallel evolution. Evolution (N. Y). 59, 216 (2005).

CAS Google Scholar

Zagorski, M., Burda, Z. & Waclaw, B. Beyond the hypercube: evolutionary accessibility of fitness landscapes with realistic mutational networks. PLoS Comput. Biol. 12, 118 (2016).

Article CAS Google Scholar

Gillespie, J. H. Molecular evolution over the mutational landscape. Evolution (N. Y). 38, 1116 (1984).

CAS Google Scholar

Bailey, S. F., Guo, Q. & Bataillon, T. Identifying drivers of parallel evolution: A regression model approach. Genome Biol. Evol. 10, 28012812 (2018).

See the rest here:

A mutational hotspot that determines highly repeatable evolution can be built and broken by silent genetic changes - Nature.com

Posted in Evolution | Comments Off on A mutational hotspot that determines highly repeatable evolution can be built and broken by silent genetic changes – Nature.com

Page 87«..1020..86878889..100110..»