Jane Goodall

It's just you can't help it.

You feel you're dealing with a whole lot of people actually.

So, yeah, I get mad at him and I try to avoid him.

Yeah, it's just the one.

I mean, the others are just the same wonderful chimps.

They always have been.

And I think if I was there all the time, this problem would go away.

I think it's because I disappear for so long.

And there is something in the chimps' makeup that even if it's another chimp, a long separation is likely to lead to aggression when the two chimps meet again.

What was the tool?

Yeah, that's right.

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.