It was the largest primate ever to have roamed the Earth, but just why – and when – our distant cousin “giganto” ended up extinct has been something of a mystery. Now researchers say the enormous ape was victim of an unfortunate choice of food when its preferred snacks became scarce. Gigantopithecus blacki roamed mainland south-east Asia 2 million years ago, with estimates suggesting it was three metres tall and weighed 200-300kg – roughly three to four times a human’s weight. Previous studies have shown giganto’s range decreased considerably by…