Charm Your Girl With the Right Testosterone Levels

A right mixture of testosterone can make healthy brain changes and a new study sheds light on how testosterone acts in the human brain to regulate speech and could help explain how anabolic steroids affect human behaviours. Singing and courting a female canary is more than just motivation. What's needed is a right mix of testosterone. Researchers at the Johns Hopkins University have found that introducing testosterone in select areas of a male canary's ...