In the vast jungles of mystical Sumatra, locals have reported seeing a creature that looks something like an ape, yet it walks just like us. They've named it "Orang Pendek" - the little man of the forest. A recent scientific discovery proposes that another species of humans - nicknamed 'hobbits' - did once live in Indonesia. So could there be a new great ape waiting to be discovered? Or is it possible we're not the only human species living on earth? Biologist and beast hunter Pat Spain investigates.
