Science Rules! with Bill Nye

Hidden Brain: Humor Us

Science Rules! Presents is a series of science-focused episodes from some of our favorite shows. This week we’re featuring Hidden Brain's “Humor Us.” Hahaha! The average four-year-old child laughs 300 times a day. By contrast, it takes more than two months for the average 40-year-old adult to laugh that many times. This week, we talk with behavioral…