Tiny people giggle at everything from tickling to peek-a-boo to silly faces. But do they really have a sense of humor?

When a baby is born, one of the first signs that doctors, nurses, and even family members look out for is the unmistakable sound of the baby’s first cry. While it may seem like a simple, instinctive ...

Laughing and crying seem to have a special, if slightly confusing, affinity for one another. Most of us have had the experience of laughing and crying simultaneously. Sometimes the expression of both ...