Teenagers in Los Angeles collected about 22,000 tennis and pickleball balls in one day, keeping 2,675 pounds of waste out of landfill.

A UCSF scientist who cracked a cancer gene once called undruggable has won $1 million, after his work led to drugs now helping cancer patients.

A rare West African bird unseen since 2013 has been photographed in Ivory Coast, and the find means every “lost bird” in West Africa has been found.