Gombe Stream

Declared in 1968 over the reserve where the British primatologist Jane Goodall arrived in 1960, barely 26 years old, to begin what would become the longest-running field study of chimpanzees in the history of science, now in its seventh decade. It was here that she first documented tool use by wild chimpanzees, a finding of 1960 that forced science to redraw the line separating humans from the rest of the animals.