Laughter Is Contagious
Hearing others laugh can trigger laughter in the listener, even without a joke.
Related Facts
Laughter30 views
A 1962 Laughter Epidemic in Tanganyika Closed Schools
It began at a girls' school in what is now Tanzania and spread to nearby villages.
Laughter46 views
Great Apes Make Laughter-Like Sounds When They Play
Chimpanzees, gorillas and orangutans produce panting sounds during tickling and play.
Laughter31 views
The Scientific Study of Laughter Is Called Gelotology
Researchers examine how and why humans laugh.
Laughter33 views
Babies Begin to Laugh at Around Three to Four Months
Laughter appears long before a child learns to speak.