08/07/2013 12:36 pm ET Updated Oct 07, 2013

13 Animals Who Use Tools (NEW BOOK)

Primates, out now from First Second, is a book about Jane Goodall and chimpanzees and Dian Fossey and gorillas and Biruté Galdikas and orangutans. It's a book about all of us, and what makes us unique in the animal kingdom.

And about some things that are not so unique, as it turns out.

Goodall, Fossey, and Galdikas' discoveries were milestones in redefining what it means to be human. To paraphrase a 1963 quote from the mentor Louis Leakey, we used to define "human" as the animal that use tools. Now we must either redefine "tool", redefine "human", or accept chimpanzees as being human as well.

Since he said that, the list of potential humans has grown well past chimps...

Animals Who Use Tools