The Greeks dubbed them “river horses,” and for years, archeologists and biologists agreed that they were probably (evolutionary...

Detail of Bao board Yintan [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (http://creativecommons.org/licenses/by...

We talk a lot about external threats to wildlife populations, because they are by far the biggest causes for concern. But in th...

Most of us have probably seen Fantasia, or at the very least, a clip of the hippos twirling around in tutus and nearly overwhel...