It’s the world’s rarest ape. Now a billion-dollar dig for gold threatens its future

Tapanuli orangutans survive only in Indonesia’s Sumatran rainforest where a mine expansion will cut through their home. Yet the mining company says the alternative will be worseA small brown line snakes its way through the rainforest in northern Sumatra, carving 300 metres through dense patches of meranti trees, oak and mahua. Picked up by satellites, the access road – though modest now – will soon extend 2km to connect with the Tor Ulu Ala pit, an expansion site of Indonesia’s Martabe mine. The road will help to unlock valuable deposits of gold, worth billions of dollars in today’s booming market. But such wealth could come at a steep cost to wildlife and biodiversity: the extinction of the world’s rarest ape, the Tapanuli orangutan.The network of access roads planned for this swath of tropical rainforest will cut through habitat critical to the survival of the orangutans, scientists say. The Tapanuli (Pongo tapanuliensis), unique to Indonesia, was only discovered by scientists to be