On this week's episode of Quirks & Quarks with Bob McDonald:
The first land animal to go legless three hundred million years ago
Early vertebrates put in a lot of effort evolving fins into the legs that would carry them up on to land. Now a newly studied 305 million year old fossil suggests one ungrateful lineage decided to abandon its limbs for snake-like slithering almost immediately after. Hillary Maddin, a paleontologist in the Department of Earth Sciences at Carleton University, was part of the team that analyzed the fossil. Their work was published in Nature Ecology and Evolution
Quirks and Quarks7:47The first land animal to go legless three hundred million years ago
What did history smell like? New field of science aims to find out
Most archeology is aimed at digging up artifacts that can tell us what the ancient past looked like. But in a new paper published in the journal Nature Human Behaviour, PhD candidate Barbara Huber, from the Max Planck Institute for the Science of Human History, issues a call to action. She's urging fellow archaeologists to focus on what the past smelled like. By using the latest biomolecular technology, Huber has been able to extract scent residues from perfumes and incense in pots dating back thousands of years, and has even extracted spices from the proteins in ancient skeletal teeth. Huber says that these scents can paint a vivid picture about trade routes, societal hierarchies, and rituals.
Quirks and Quarks8:10What did history smell like? New field of science aims to find out
This Canadian researcher was trapped on a Russian ship as war broke out
Evgeny Pakhomov, a professor in the Institute for the Oceans and Fisheries, found himself in an unenviable position when Russia invaded Ukraine in February. He was chief scientist for an international research expedition to study salmon on the high seas, with investigators from Canada, Japan, South Korea, the U.S. and Russia. Which is why he ended up on board a Russian fisheries research vessel in the middle of the Pacific, with no way to get home.
Quirks and Quarks9:12This Canadian researcher was trapped on a Russian ship as war broke out
Sharks sleep, sometimes with their eyes wide open
Craig Radford, an associate professor of marine science at the University of Auckland in New Zealand, found that, contrary to popular belief, sharks, just like humans, sleep to conserve energy. The team correlated a resting body posture with reduced metabolic activity, which indicated sleep. They were surprised to find, however, that sometimes sharks sleep with their eyes wide open. The research was published in the Royal Society Biology Letters.
Quirks and Quarks7:37Sharks sleep, sometimes with their eyes wide open
A new book puts together the story of how people came to the Americas
Over the last 30 years new archeological discoveries and DNA evidence have rewritten the story of the first people in the Americas. We now know people were here earlier than we'd thought, and much more about where they came from and how they got here. Bob speaks with anthropologist Jennifer Raff about the new story and her book, Origin, A Genetic History of the Americas.
Quirks and Quarks17:44A new book puts together the story of how people came to the Americas
The rest is here:
Apr 16: Legless fossils, smells of the past, research with Russia and more - CBC.ca
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