Two chimps, one grooming the other on the chin
Chimps Appear to Treat Others' Wounds Using Insects
The practice, which hasn’t been previously observed among nonhuman animals, may be a display of empathy. 
Chimps Appear to Treat Others' Wounds Using Insects
Chimps Appear to Treat Others' Wounds Using Insects

The practice, which hasn’t been previously observed among nonhuman animals, may be a display of empathy. 

The practice, which hasn’t been previously observed among nonhuman animals, may be a display of empathy. 

ABOVE: Tobias Deschner
medicines
Drug Headlines of 2011
Hannah Waters | Dec 20, 2011
A list of this year’s newsworthy successes—and failures—in drug development