World May 01

Caster Semenya of South Africa wins the semi-final heat of the 800 meters semi-final at the World Athletics Championships in London on August 11, 2017. Photo by Toby Melville/Reuters
Olympic runner loses fight over testosterone rules

The sports world's highest court ruled female runners with unusually high testosterone must take medication to reduce their levels of the male sex hormone if they want to compete in certain event.