FILE - Richard Leakey, Kenyan wildlife conservationist, places a rhino horn to be burned at the zoo in Dvur Kralove, Czech Republic, Tuesday, Sept. 19, 2017. Paleoanthropologist Richard Leakey, known for his fossil-finding and conservation work in his native Kenya, has died at 77. His death was announced Sunday, Jan. 2, 2022 by Kenyan President Uhuru Kenyatta. The cause of death was not announced. (AP Photo/Petr David Josek, File)