Tears are unique to humans, but distress calls are common among most other mammal and bird young, often when separated from their mothers. Crying extends far beyond infancy. A University of Pittsburgh ...

This article was featured in One Great Story, New York’s reading recommendation newsletter. Sign up here to get it nightly. Crying has been one of the most popular activities of the past four to eight ...

Kaplan is the author of many popular books including the New York Times bestseller The Gratitude Diaries and her new book What Your Body Knows About Happiness. She is the former editor-in-chief of ...