It's not often that a fossil truly rewrites human evolution, but the recent discovery of an ancient extinct ape has some scientists very excited. According to its discoverers, Danuvius guggenmosi combines some human-like features with others that look like those of living chimpanzees. They suggest that it would have had an entirely distinct way of moving that combined upright walking with swinging from branches. And they claim that this probably makes it similar to the last shared ancestor of humans and chimps.