By The Numbers: Behind Sunscreens Confusing Figures

Most people know that, generally, the higher the SPF the greater the protection. But after that, things get sketchy, a recent survey by dermatologists at Northwestern University found. Among the group surveyed, fewer than half could tell from reading a sunscreen label how well it protected against skin cancer, premature aging or sunburn, according to Roopal V. Kundu, a dermatologist at the universitys Feinberg School of Medicine, who helped conduct the survey.

Also, only one added gene was needed to turn the Yersinia pestis bacterium into a killer, and only one tiny mutation in that gene was needed to give it two ways of spreading by cough or by flea bite, said Wyndham W. Lathem, a microbiologist at Northwestern University Feinberg School of Medicine who oversaw a team inserting genes into ancestral versions of Y. pestis in mice.

In a first-time pilot program, Northwestern University's Center for Audiology, Speech, Language and Learning, and the Lurie Children's Hospital's Gender and Sex Development Program teamed up recently to offer a vocal therapy group for transgendered youths.

Colorado theater shooter James Holmes' IQ score dropped dramatically over two years he was in jail, possibly because of mental illness. Dr. Robert Hanlon, a medical expert from Northwestern Universitys Feinberg School of Medicine, testified Thursday that Holmes had an above average IQ of 123 when he first examined him in April 2013, nearly a year after he killed 12 people and wounded 70 during a packed movie premiere. But that number fell to 116 by the time Hanlon examined Holmes again in January 2015.

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Northwestern University Feinberg School of Medicine