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  • News Feature: Singing in the brain
    Songbirds are helping scientists decipher the foundations of human speech. But new work on bats may provide missing pieces of the puzzle. Image courtesy of © Steve Gettle/Minden Pictures.





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  • Prevalence of knee osteoarthritis
    Using cadaver skeletons from the early industrial era, from the 1800s to early 1900s, and the modern postindustrial era, from the late 1900s to early 2000s, as well as skeletons of prehistoric individuals, researchers found knee osteoarthritis (OA) in 16% of the postindustrial individuals 50 years and older, but only in 6% and 8% of the early industrial and prehistoric samples, respectively; the findings indicate a doubling of knee OA prevalence since the mid-20th century.
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  • Predictors of guide dog success
    Researchers followed puppies enrolled in a training program for guide dogs from birth to 2.5 years of age, and found that intensive mothering as well as poor performance on a problem-solving task and high apparent anxiety when confronted with a novel object were associated with failure in the program.
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