“Exploring testosterone in affiliative social interactions gives us insight into the vast role that neuromodulators can play beyond these historic groupings. For instance, testosterone’s ability to ...

When animals rise in social status, their testosterone levels increase as well. This change produces the increased confidence that accrues to social status as well as increased aggression. Some ...

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 ...

WASHINGTON (Reuters) - Younger chief executives with high testosterone levels may be more likely to try a hostile takeover -- and to get burned in the attempt, Canadian researchers said on Wednesday.

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 familiar type — a young macho bruiser on the way up ...

Manly boost Chopping wood to clear land and feed the family produces more testosterone in men than competitive activities like sport, a new study has found. The discovery is changing scientists' ...

Historically, testosterone has been associated with masculinity. Someone having high levels of testosterone was shorthand for perceived higher levels of aggression, strength, and libido. However, ...

Despite drug's health risks, users laud improved looks and energy boost. Sept. 18, 2012 — -- From world-class sporting scandals in baseball and on the track, performance-enhancing drugs seem to ...