We’ve known for a while that testosterone is associated with aggressive behavior. But a fascinating new experiment reveals that these hormones are a two-way street: Simply acting aggressive can also raise levels of testosterone, in both women and men.
Women know that menopause can put a “sell by” date on getting pregnant, but common wisdom says that men retain much of their fertility well into old age. That common wisdom is wrong.
Hormone surges at puberty trigger a lot of physical changes in both men and women, morphing child-bodies into adult forms. Genitals, hips, and muscle mass change, obviously–but so do faces. A new study suggests those facial changes are primed to happen by the presence of testosterone in utero.
Male or female, most of us have body hair—some far, far more than others. This video explains how testosterone fuels the growth of hair all over your body.
You might have a friend who has to take them for asthma. You might know someone else who denies taking them but has gotten crazy ripped really fast and angers easily. Famous athletes are denying or being caught with them in their blood stream seemingly every day—just yesterday, MLB slugger Ryan Braun successfully…
Major League Baseball MVP Ryan Braun reportedly tested positive for steroid use on Saturday, a shock for a game whose marquee players had largely overcome their collective reputation as a tainted bunch of juicers.
A recent study published in the Proceedings of the National Academy of Sciences suggests men's testosterone levels fluctuate when they have children.
Check out this video, where these guys have created a chainsaw using a V-8 engine. A chainsaw is already the most dangerous object you can hold in your hands, but take a look at what this one can do to a gigantic log. Cuts through it like butta.