The results showed that most of our primate ancestors had digestive enzymes largely inactive against ethanol.

That's 20 times older than other significant fossil finds and the point at which our primate ancestors began first developing the features that would evolve into our own.

If our primate ancestors were cast out of the group, they were less likely to make it.

In addition, paleoarchaeologists often deal with remains that lie somewhere between their primate ancestors and modern humans.

The earliest primate ancestors of modern humans most likely had light skin, like our closest modern relative - the chimpanzee.