When a baby smiles at you, it's almost impossible not to smile back. This spontaneous reaction to a facial expression is part ...

Every time we smile, grimace, or flash a quick look of surprise, it feels effortless, but the brain is quietly coordinating an intricate performance.

A new poll shows that the president’s voters are happy with his muscular foreign-policy moves in the Western Hemisphere. But perhaps for a limited time only. The big department stores are disappearing ...