'Every day we see how the lives of chimpanzees are threatened'
"Every day we see how the lives of chimpanzees are threatened." That's the view of Sabrina Krief, who has spent 15 years following, studying and fighting for the lives of chimpanzees. The primatologist has studied the endangered species at length, particularly in the forests of Congo and Uganda. Amongst her latest discoveries: the animals' faces are becoming flatter, and pesticides are to blame. She joined us on Perspective to tell us more.