Baby chimpanzees groom each other in their enclosure at the Ol-Pejeta conservancy in Laikipia county on July 1, 2014 at a centre for rescued primates from illegal syndicates in animal trade. Thousands of great apes are killed or traficked into 'slavery' each year in a multi-million  illegal trade that is driving man's closest relative closer to extinction. AFP PHOTO/TONY KARUMBA        (Photo credit should read TONY KARUMBA/AFP via Getty Images)