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 ...

There’s that project you’ve left on the backburner — the one with the deadline that’s growing uncomfortably near. And there’s the client whose phone call you really should return — the one that does ...

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 ...