“Sometimes I feel like I’ve chosen the most difficult thing in the world to study,” Cheryl Knott tells me as we sit beneath the rain forest canopy at her orangutan research station in ...

Orangutans that live in Sumatra usually make their nests in palm forests. But one day in 2014, Panut Hadisiswoyo caught sight of an orangutan riding around the streets of Medan, the island’s ...

The orangutan sighting "was definitely because their habitat has been disturbed and is getting smaller," he said. "Our endangered wildlife could go extinct," he warned. "It's a natural wealth from ...