Jane Goodall

And not only using it as a tool, but actually making tools, which is the real breakthrough.

It was a piece of grass, and it was being used by a chimpanzee whom I'd named David Greybeard.

who was the first to lose his fear of me.

And when I saw him squatting on this termite mound and using this piece of grass as a tool and then picking a leafy twig and stripping the leaves off, thus making the object suitable to fish for termites, I actually was so excited I couldn't believe it.

And I wouldn't let myself get too worked up until I'd actually seen it again on another day.

Because it seemed so unlikely and I didn't have a very clear view.

I was sort of hidden in the vegetation.

But anyway, it was real.

Describe a little bit more how he was using this grass as a tool.

Well, the termites make a mound.

There are a lot of different kinds of termites.

And these make large, very, very hard earth compacted by their own saliva.

And they're reddish colored.

and at a certain time of year, the winged termites fly out, and the worker termites make passages up to the surface of these nests, these very hard nests.

And so David would pick a piece of grass, carefully push it into one of these tunnels, wait for a moment, pull it out very, very carefully, and there would usually be termites biting on, and he would then pick them off with his lips and crunch them up.

So when you described this to Louis Leakey, what was his reaction?

Now we must redefine man, redefine tool, or accept chimpanzees as humans.

I think, you know, I didn't really pay any attention to that.

I didn't do anything.

I think what's fascinating is every time