This elephant's weeping temporal glands and frequent urination are a sure sign he's in a condition known as musth. Musth ...

Here are 10 animals that have some of the highest levels of testosterone and the impact it has on their behavior and characteristics.

PESCADERO, Calif. (AP) — Every winter about 10,000 elephant seals make their way to California's Año Nuevo State Park to fight, mate and give birth. The spectacle runs from mid-December through March, ...