When Dr. Richard Wiseman launched LaughLab in 2001, he didn’t expect 40 000 joke submissions and over a million votes. Yet the results said less about punchlines and more about people.

The “funniest joke” went like this:

Two hunters are out in the woods when one collapses. His friend calls emergency services: “My friend is dead! What can I do?” The operator replies, “Calm down, I can help. First, let’s make sure he’s dead.” Silence. Then a gunshot. Back on the phone, the guy says, “Okay, now what?”

Not everyone laughed and that was the point. Humor is both universal and deeply personal.

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The Science of a Laugh

Behind every laugh, 15 facial muscles tighten, your breathing turns uneven, and your brain’s reward system lights up like fireworks. The superior frontal gyrus and limbic system collaborate to trigger the burst of mirth that releases endorphins, the same chemicals responsible for a runner’s high.

Neuroscientist Peter Derks found that jokes activate both sides of the brain: the left parses language; the right catches the twist. Humor, at its core, is fast pattern recognition which is a mental “plot twist” you didn’t see coming but suddenly makes sense.

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Some Ways Science Explains Funny

Incongruity–Resolution Theory – Currently the most predominant explanation among humor researchers, this theory focuses on the cognitive aspect of humor. A joke creates an expectation or mental script in the listener's mind, which is then violated by an unexpected punchline. The humor comes from recognizing the absurdity or the clever way the two opposing ideas (incongruity-resolution) are made to fit together in a "pseudo-sense".
Superiority Theory – This is the oldest theory, suggesting that we laugh at others' faults or limitations because it makes us feel better or more intelligent by comparison. It can explain the appeal of "fail" videos or jokes that target specific groups, where the amusement comes from a feeling of "sudden glory" at recognizing one's own relative eminence.
Benign Violation Theory – A modern, integrative theory, BVT suggests humor occurs when three conditions are met simultaneously: a situation is a violation of a social norm or expectation, it is perceived as benign (safe or non-threatening), and both perceptions occur at the same time. This explains why a "prank" is funny if the victim is unharmed (benign violation), but tragic if someone gets seriously hurt (violation without benignity).

Most contemporary psychologists agree that no single theory fully explains all types of humor. Instead, a combination of these factors i.e., incongruity, resolution, relief, and social context is often required to understand the complex nature of why we find things funny. Humor can serve important social functions, such as strengthening social bonds, coping with stress, and communicating sensitive information in a non-serious way.

Laughter as Social Glue

Robert Provine’s decade-long field studies showed people are 30 times more likely to laugh around others. Most laughter, he discovered, doesn’t follow a formal joke and it punctuates ordinary talk: “See you later,” “Are you sure?” “I know!” We laugh to show warmth, not wit.

Laughter evolved as a signal of safety. Our primate cousins use laughter-like sounds in play to show “this is fun, not a fight.” Evolution turned laughter into a tool for trust.

Laughter Really Is Medicine

Physiologically, laughter lowers stress hormones, eases muscle tension, boosts immune markers, and even steadies blood sugar after meals. You literally can’t stay angry and laugh hard at the same time.

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**So, What Did LaughLab Teach Us?**

Humor resists universal formulas. Yet Wiseman’s experiment proved that shared laughter hints at shared perspective. What makes us laugh may change across cultures, but the need to laugh is coded into being human.