Jane Goodall: I think it was the day when I got back to the little camp, in the evening with Gillian, and we’d just encountered this young male lion — about two years old, his mane beginning to sprout — and he’d followed us — oh, I don’t know, I mean the length of a long room, which was a bit scary but it was really exciting. And I was telling Louis about this, and I think that’s when he realized I was the person he’d been looking for to go and try and learn about chimpanzees in the wild. Because his reckoning was, “They are our closest living relatives.” And he didn’t know back then quite how close biologically they actually are to us, but it was known they were close. And so he argued that if somebody would go and learn about them in the wild, if we found behavior that was the same or very similar in chimpanzees today and humans today, then if we agreed that there was a common ancestor about six, seven million years ago, then maybe that behavior was present in the common ancestor. And therefore, we brought it with us, all up through our evolutionary pathway, and that would help him to have a better feeling for how early humans behaved, the creatures whose fossil remains he was digging up. That’s why he wanted somebody to study them, and he asked if I would. Well yes!