LONDON (Reuters Life!) - Testosterone makes people behave badly, but only because of our own prejudices about its effect, not its true biological action, scientists said on Tuesday. A Swiss and ...

Dr. Sapolsky is a neuroscientist and primatologist. I was observing a 9-year-old male baboon in the Serengeti of East Africa one day in 1983. Baboon troops are very hierarchical, and this baboon was a ...

Why testosterone affects behavior When asked how T may enhance context-appropriate behavior, Dr. Aubrey Kelly, assistant professor at the Department of Psychology at Emory University, and lead author ...

Toxic masculinity is a major societal concern. It is said that testosterone from the testes makes men overly aggressive. But the biology of hormones and aggression is not that simple. A symposium ...

There are three morphs in ruffs that differ in their appearance and mating behavior. Males of the aggressive Independents (left) have more testosterone in their blood than the other two morphs (a male ...

What used to be a niche treatment for men with legitimate medical conditions has morphed into "youth and vigor" as a ...