telegraph | Our animal ancestors, and most of their descendants, laughed simply because they were enjoying themselves, according to a new study.
But over millions of years humans have perfected how to use the sound to wound as well.
Great apes which roamed the earth 16 million years ago are thought to be the first who developed the ability to laugh.
Modern-day Orangutans, the only species of Asian great ape, laugh when they are having fun, while African great apes, which include gorillas and chimpanzees, have learned that the sound can be used to influence others, but still only use laughter while playing.
However, human have gone much further, using laughter for a range of negative emotions, including to ridicule or sneer.