How Do You Get Crabs From A Gorilla?

“If you’re at all curious about the secret that pubic lice have been keeping for over three million years, the tale of a mysterious liaison between our ancestors and the ancestors of gorillas – read on.”

This is a fascinating essay, by Carl Zimmer, about the co-evolution of parasites and hosts. Here’s something I didn’t know this morning: We did not get pubic lice from other hominids. We got them from the ancestors of gorillas.