Have you ever stopped to wonder why sex and violence so often go hand in hand?
Social insects such as wasps, bees, and ants rely on sight and odor to distinguish a nest mate from an outsider, but can they decipher between individuals?
Recent studies suggest a correlation between progesterone levels and paternal behavior. Learn more on this Moment of Science.
These particular subjects were then matched with people they had not met before to play a game in which the winner was able to blast the loser with an unpleasant noise, the intensity and duration of which were adjustable by the winner.
Two studies suggest that those individuals most prone to violent behavior are narcissists. In Greek mythology, we know Narcissus as the man who fell in love with his own reflection in the waters of a spring, and whose excessive self-love killed him.