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Testosterone in male songbirds may enhance desire to sing, but not song quality Posted: 30 Dec 2013 10:49 AM PST Introducing testosterone in select areas of a male canary's brain can affect its ability to successfully attract and mate with a female through birdsong. These findings could shed light on how testosterone acts in the human brain to regulate speech or help explain how anabolic steroids affect human behaviors. |
Mongooses synchronize births to escape despotic females Posted: 23 Dec 2013 03:14 PM PST Some mammals may have evolved to synchronize births as a way of evading the threat of infanticide, according to a study. |
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