It’s never pleasant to be rejected, whether by a close romantic partner or by a stranger who just seems to shun you. It may be even worse when you're on the outs with an in-group. Psychologists are ...

We’ve been bonding with animals for eons—as far back as 12,000 years ago, when a human was buried with its hand resting on the skeleton of a 6-month-old wolf pup. Going back even further in time, the ...