Kenya's wide-open, postcard-perfect savannah is dotted with acacia trees in every direction as the early morning fog still clouds the air. Donart Mwakio is doing his rounds in a white pickup truck when it suddenly screeches to a halt. The ranger at Kenya's Taita Hills Wildlife Sanctuary hops out of the back and stands over an unusual-looking carcass.

Burundian runner Francine Niyonsaba, who has an intersex condition, broke a world record on Tuesday.