Some animals rarely if ever interact with one ... or potential cost of the individual who performs the act. An example of altruism comes from ground squirrels, who may warn other members of ...

While kindness is often seen as a uniquely human trait, it turns out that many animals also display behaviors that resemble empathy, compassion, and altruism. From ... Continue Reading → ...

Reciprocal altruism occurs where the roles of the donor and recipient are later reversed. This often occurs in social animals. For example, vampire bats feed only on blood. An individual cannot ...