Apes are famous for learning human language.

It's artificial to test apes on human language – they have their own way of communicating.

Kanzi makes up words. For example, "finger bracelet" (ring).

Kanzi went to talk to the guilty chimp, and brought back the stolen keys.

Kanzi is a chimpanzee – an animal quite like a human with hair all over his body.

He responds to an enormous number of spoken commands and questions.

Kanzi responded correctly to 74% of 660 requests and instructions.

And critics believe that it's artificial to test apes on human language.

Gorillas, which live in Africa, look like people with a lot of hair on their bodies.

I've done nothing wrong, so I don't feel guilty.

Kanzi makes up new words. For example, "finger bracelet" (ring).

Monkeys are very intelligent and can learn to communicate with humans.

They have their own natural way of communicating.

People go to hospital if they need an operation.

They have a close relationship – they're good friends.

Kanzi is clearly a remarkable chimp – he's so intelligent.

Kanzi responded correctly to 74% of 660 requests and instructions.

Kanzi communicates by touching simple images or symbols on a computer.

Think of me as your friend and personal trainer.

She told him to wash a potato and then turn off the water.