April Fools' Day (April 1st)

Not every species has the capacity to chuckle. We are lucky that we do. What happens in our bodies when we laugh?

Human beings love to laugh, and the average adult laughs 17 times a day.

Everyone likes a good belly laugh from time to time, and science supports that feeling. Studies show that laughing is linked to our physical, emotional and mental well-being

When it comes to relieving stress, more giggles and guffaws are just what the doctor ordered. Here's why.

Explore the common scientific theories about why humans laugh, and how this universal behavior evolved. Related Lesson

How studying what tickles our funny bone can help explain who we are.

Psychologists, neuroscientists and philosophers are trying to understand humor. Oh no!!