Kenyan President Uhuru Kenyatta announced on Sunday that world-renowned paleoanthropologist Richard Leakey, known for his fossil-finding and conservation work in the country, had died at 77. Al Jazeera reports that Leakey, whose groundbreaking discoveries helped prove that humanity evolved in Africa, remained energetic into his 70s despite bouts of skin cancer, kidney and liver disease. Born on December 19, 1944, he was perhaps destined for palaeoanthropology – the study of the human fossil record – as the middle son of Louis and Mary Leakey, perhaps the world’s most famous discoverers of ancestral hominids.