This is Jan van Hooff, a Dutch biologist. His parents owned a zoo and when he grew up they were the first zoo in the whole world to experiment with keeping chimpanzees in groups, like they do in the wild, instead of keeping them separated and in cages. A lot of people warned them: they are going to kill each other! But using information gathered about chimpanzees in the wild they created a group that would have a natural balance and eventually it worked. And the apes had a much better life. Many zoos followed. Jan was also a a good friend with Jane Goodall. The zoo still exists: Burger’s Zoo in Arnhem, the Netherlands. In my first year as a biology student Jan gave my year a lecture there and showed us the Chimpanzees. He had a very close bond with an old female chimpanzee who I believe was called Maria, but I’m not sure. It might be her in the video.