Not sure whether your leopard gecko is male or female? Thankfully, determining the sex of one of the adorable little lizards ...

Most every culture has recognized trans people and gender non-conforming people. It’s just that people haven’t always ...

New research suggests that the unique way human placentas produce sex hormones during pregnancy may have been a key driver behind our species' extraordinary brain development and social behavior.

A video showcasing a man taunting a wild hippo went viral on social media. The clip sparked amusement and concern as people ...

With jaws that stretch four feet wide and tusks up to 20 inches long, hippos are built for brutal combat in the wild.

A 4,000 year old ancient Egyptian tomb filled with the skeletons of 11 individuals, including children, has been discovered ...

Healthy baby hippo born at city zoo to Vimala and Gokul, surviving attack and being closely monitored for health.

From their odd appendages to their unsavory hygiene, certain animals suffer an image problem. But their awkward attributes ...

A rare male pygmy hippopotamus born in a Czech zoo debuted his first photoshoot on Monday to the delight of spectators. He is considered a valuable addition to the conservation efforts of the ...

PRAGUE — A rare male pygmy hippopotamus born in a Czech zoo debuted his first photoshoot on Monday to the delight of spectators. He is considered a valuable addition to the conservation efforts ...

PRAGUE — A rare male pygmy hippopotamus born in a Czech zoo debuted his first photoshoot on Monday to the delight of spectators. He is considered a valuable addition to the conservation efforts ...