Our earliest primate ancestors may have been cold-weather survivors, not tropical tree-dwellers. Credit: Shutterstock Most people imagine our early primate ancestors swinging through lush tropical forests. But recent research shows that they were braving the cold. As an ecologist who has studied chimpanzees and lemurs in the field in Uganda and Madagascar, I am fascinated by the environments that shaped our primate ancestors. These new findings overturn decades of assumptions about how – and