A mysterious group of apes found in the war-torn Democratic Republic of Congo in central Africa has scientists and conservationist scratching their heads. The apes nest on the ground like gorillas but have a diet and features characteristic of chimpanzees.
The apes are most likely a group of giant chimpanzees that display gorilla-like behavior. A far more remote possibility is that they represent a new subspecies of great ape. Researchers plan to return to the region later this month to collect more clues to help resolve the mystery.