One thing that fascinates many scientists is the question of behavior. Why do different species act the way that they do? And what about different individuals within species? Is it programmed in their genes? Is it programmed in their brains? Is it determined by their environment and social interactions? This week we report on some amazing behaviors from around the animal (and human) world… and more! Wonder what species can sleep with half their brain at a time? Want to know what species elects their leaders?