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Orangutans show talent for mime

11 August 2010 Last updated at 10:41 BST

Just like humans, orangutans use mime to get their messages across, scientists report in the journal Biology Letters.

In this footage, an orangutan called Siti attempts to get a technician to help her break a coconut.

She picks up a piece of palm and repeatedly strikes the coconut, miming the action that her human companion would have used with his machete.