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

• During courtship, a male and a female elephant will rub their bodies on each other and even wrap trunks. The females tend to run away from the males and he will have to pursue her. This game of cat ...

Asian elephant calf Linh Mai will make her public debut at Smithsonian’s National Zoo and Conservation Biology Institute this Earth Day, April 22. She was born Feb. 2 to mother Nhi Linh and father ...