This Gigantic Ancient Kangaroo Didn't Hop — It Actually Walked

For millions of years there lived a rather large species of kangaroo in Australia called sthenurines. Weighing in at 550 pounds and featuring a 6'6" frame, these Pleistocene creatures must have been an awesome site — an animal made all the more remarkable by virtue of the fact that they walked around on their feet… » 10/16/14 6:20am 10/16/14 6:20am

Ancient hominids may have left the trees, but we never abandoned them

If you're quickly trying to define what sets humans apart from other primates, you might first point to our greater intelligence and our capacity for complex language. The next big difference is that we walk on two feet and stay out of the trees... except, as this video explains, it's not quite that simple. » 1/01/13 2:59pm 1/01/13 2:59pm