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Ever notice that a laugh almost always follows a specific pattern? According to researchers at the University of Maryland, laughter is composed of short notes—each about 75 milliseconds long—repeated at regular intervals. It’s physically impossible to laugh "ha-ho-ha-ho"; your body naturally sticks to one vowel sound per "bout." 3. Laughter is Social Glue

The Science of the "Ha Ha Ha Ha": Why We Can’t Stop Laughing ha_ha_ha_ha

Evolutionary biologists suggest that laughter began as a "false alarm" signal. In the wild, if a group of early humans thought they heard a predator but realized it was just the wind, they would laugh to signal to the rest of the tribe that the danger had passed. Today, that "all clear" signal has evolved into a social bonding mechanism. When you laugh with friends, you are essentially telling them, "I feel safe with you." 2. The "Ha Ha" Rhythm Ever notice that a laugh almost always follows

Humans aren't the only ones with a sense of humor. Rats chirp when they are tickled, and chimpanzees have a panting "laughter" they use during play. It seems the "ha ha" is hardwired into the mammalian brain as a way to facilitate play and cooperation. The Bottom Line Laughter is Social Glue The Science of the