Recent research published in the journal Science revealed that mice demonstrate altruistic behaviors by assisting unconscious ... "They really open the mouth of this animal and pull out its tongue,” ...

Scientists since Darwin have wondered why animals like these perform cooperative behaviors that may be detrimental to their own evolutionary fitness. One key to understanding such altruistic ...

The benefit of an altruistic behavior is ultimately measured in its effect on an animal’s lifetime reproductive success. Evolutionary biologists and animal behaviorists have sought to identify ...