Using data from 23 studies of what psychologists call 'inequity aversion,' researchers combed through results of more than 60,000 observations involving 18 animal species. In what they said was the ...

In this video, I try to give both of my goats some love, but Bella is not having it! Watch her sassy antics as she tries to ...

How much do you know about the old green-eyed monster? Is jealousy a sign of love or of a personality defect? Is it one of those things that are part of human nature and can't be changed? Take this ...

It’s a question that has puzzled thinkers for centuries: Are we humans alone in our pursuit of fairness and the frustration we feel when others get what we want? In recent years, evolutionary ...