Chimp Cooperation

In this video:
1. Food is hidden under a concrete slab.
2. The chimp is allowed to find the food itself. It tries to lift the slab but can't.
3. A man comes and shows him how to lift the concrete slab up.
4. The chimp tries to lift it alone but then asks for the man's help to lift the slab up.

Tickling Apes

In this video:
1. There is a gorilla in a cage. He's presenting his feet to be tickled and the zookeeper is tickling his feet.

2. A baby oran-utan is lying on the ground and the zookeeper is tickling him. The baby orang-utan is giggling.

The Chimpanzee's Memory

In this video:
1. The chimpanzee is counting from 1 to 9 in the right order and it gets peanuts as a reward,

2. It is counting the numbers which are covered up on the screen.

3. Chimps do this exercise much better than humans because they care more about peanuts!