Some scientists believe that laughter serves a function that expanded after humans diverged from other great apes and developed larger social groups and more complex language abilities.
Using ultrasound recording equipment, researchers in the late 1990s discovered that mice essentially giggle when they are tickled.
Humans are not the only animals that can laugh. (Illustrative photo).
Since then, scientists have compiled evidence of at least 65 species, primarily mammals, but also some birds that vocalize while playing together.
It is no surprise that some of these species are our closest relatives. By recording and analyzing the sounds primates make during play and when tickled, researchers are increasingly convinced that the ancient ancestors of all great apes produced something akin to laughter.
And because other monkeys produce sounds similar to laughter while playing, they speculate that laughter may serve as a clear signal of friendly, non-aggressive intent.
They hypothesize that laughter gradually evolved into something we can use not only during play but also in speech to convey subtle meanings and a range of contexts to express emotions. Just hearing laughter can activate important regions in your brain, prompting you to smile.
Moreover, laughter is not only significant socially; it is also believed to be beneficial for health. When we laugh, the brain releases neurotransmitters that create feelings of pleasure, such as endorphins, while reducing levels of stress hormones like cortisol. Some studies even suggest that those who laugh more may cope with stress more effectively and have better cardiovascular health.
Laughter is a universal human behavior. Infants can laugh before they can speak. Laughing makes life more enjoyable, strengthens bonds, and may improve various aspects of your health.
