The joke’s on time: laughter may be far older than we thought
On top of that, a new analysis pushes the roots of laughter back to roughly 15 million years ago, which is a long way from the modern human habit of snorting into a coffee cup at the wrong moment. The result came from work led by Chiara De Gregorio at the University of Warwick and published in Communications Biology. But the real story sits underneath it: laughter may be a shared ape behavior that survived because it did something useful, given the headline number’s eye-catching.
That matters because the trait shows up across the great apes, not in one isolated species having a particularly good day. Orangutans, gorillas, chimpanzees and bonobos as well as humans all have some version of laughter or laughter-like vocal play. When a behavior travels that far across a family tree, biologists start asking a sensible question. What kept it around? Random quirks tend to vanish. Behaviors that help with social life tend to hang on.
If laughter shows up across an ape family this wide, it probably solved a social problem before it became entertainment.
Still, the study points in that direction without getting carried away. Laughter seems to have persisted because it carried a durable social benefit, whether in play, bonding, easing tension, or keeping rough-and-tumble interactions from turning into real trouble (which is worth thinking about). Apes live in groups that require constant negotiation. Who can approach whom, who can play too hard, who can relax after a scuffle, who gets tolerated in the next round of grooming. In that sort of world, a vocal signal that helps people read one another a little better is doing work, even if the work comes out sounding playful.
That is where this research slips past the cute-animal-video framing. Sure, a laughing bonobo gets a grin. A baby chimp wheezing through a tickle session does too. But the study’s asking a harder question about evolution: which social behaviors survive long enough, on second thought, to be inherited, modified, and passed down through millions of years? Laughter looks a lot less like a human party trick and a lot more like an old piece of ape communication that remained useful as species branched off and lifestyles changed.
The work also gives a neat bit of historical scale to something most of us treat as everyday noise. We hear laughter in classrooms, on subway platforms, in family kitchens, in office chats that start badly and end with everyone laughing because the alternative is staring at a spreadsheet. In that sense, the sound has traveled strikingly well. It’s moved through primate history, through human culture, and into places where people now trade jokes in group texts and meme threads. Even in the era of tech news, ai policy and digital culture as well as power and politics, a basic social signal can still do what it always did: help a group stay loose enough to function.
The result does not claim to identify the first laugh ever heard. It does something more careful than that. It gives laughter a much older pedigree than most people would guess, and it suggests that the habit was already paying its way in ape societies long before humans showed up with punchlines, stand-up sets, and awkward laughs at meetings. Next comes the trickier question: how do scientists hear something ancient in animals alive today?
How the researchers listened for ancient chuckles
To work out a laughter origin that reaches back millions of years, the researchers had to do something much less dramatic than digging through fossils. They compared sounds made during play, roughhousing, and tickling, the moments when laughter-like vocalizations are easiest to capture and line up across species. That choice matters. In a casual conversation, a laugh can blur into speech, breath, or noise. During play, the pattern is cleaner. The body is doing something repeatable, and the vocal output tends to follow along.
If you want to study ancient laughter, start with the times when animals are most likely to let their guard down and make a mess of the soundboard.
The sample included orangutans, gorillas, bonobos, chimpanzees, and human children. That mix gave the team a spread across the great apes and a human reference point without pretending adults are the only people who laugh. Children are useful here because tickling and playful tussles trigger short, obvious bouts of laughter that are easier to compare with ape vocalizations. Simple as that. The researchers were not trying to decide whether a gorilla “sounds funny” or whether a child laughs like a chimp. They were building a side-by-side acoustic picture of ape laughter and human laughter under similar conditions.
At the center of the analysis was timing. The team looked for evenly spaced bursts of sound, the sort of pattern that comes across as a repeated ha-ha-ha rather than a single exhale. In practice, that means measuring how long each burst lasts, how much silence sits between bursts, and whether those gaps stay fairly regular. If the intervals line up in a steady rhythm, the laugh can be compared across species even when pitch and breathiness as well as volume differ quite a bit.
That’s why that kind of comparison lets scientists separate what seems to stay the same from what changes. Some laughs are shorter. Some are rougher. Some come in a tighter series of bursts. But if the spacing follows the same basic logic, then the comparison can focus on structure instead of surface noise. That’s useful for studies of ape laughter because the wild, flailing variety of the sound can hide the part that actually carries evolutionary information. A laugh can vary a lot and still share the same skeleton.
The method also keeps the claims
What the pattern says about our family tree
Once the researchers had the sound patterns in hand, the next question was pretty simple: what do they actually tell us about where laughter came from? The answer points back a long way. The rhythmic structure that kept showing up in the ape recordings appears to have been present in the last common ancestor of hominids, the line that leads to all great apes and, farther down the branch, our own extinct relatives too. In plain English, this isn’t a human invention that somehow popped up late in the game. It looks more like an old family habit that survived a lot of evolutionary reshuffling.
That idea fits the comparison the team drew from modern apes. The sounds made by orangutans, gorillas, bonobos, chimpanzees, and human children weren’t identical, obviously. They varied in texture, along with length and roughness. But the basic beat of the thing, the repeated burst pattern that gives laughter its familiar rhythm, was recognizably shared. The University of Warwick summary of Chiara De Gregorio’s study lays out that point cleanly: the anatomy of laughter may have changed, but the timing survived.
The joke may be ancient, but the delivery got messier as our line split off from the rest of the apes.
That messiness matters. Species closer to humans tended to produce laughs that sounded more varied and less tidy, with more of the little extras we hear in everyday human laughter. Think guffaws, snorts, wheezes, and those awkward little bursts that arrive when somebody is trying not to laugh and failing badly. Chimps and bonobos, in particular, seem to sit nearer that end of the spectrum. Their calls can sound more layered and less uniform than the cleaner bursts you might hear from other apes, which is one reason primatologists pay such close attention to chimpanzee behavior when they study the evolution of social sound.
That pattern makes sense if you think about social life rather than just vocal cords. Different ape species live under different pressures. Some spend more time in tighter groups, some less. Some spend more time grooming, some more time negotiating, some more time avoiding trouble. Laughter seems to have stayed in the family, but each lineage appears to have put its own spin on it. The core rhythm survived because it did a job, while the surface details drifted as social worlds changed.
Researchers in primatology have been circling this idea for years, and the new analysis gives it a cleaner footing. A 2011 PubMed-indexed review of laughter in primates already treated ape laughter as more than a cute curiosity, arguing that play sounds in primates can reveal older social capacities. Good news. The newer work pushes that logic further. Then the simplest explanation is that the scaffold was already there before the modern branches split, if the same rhythmic scaffold shows up across great apes.
There’s a nice evolutionary awkwardness in that. Human laughter can feel wonderfully strange and overdone, all breathy hiccups and noisy collapse, but the study suggests the family resemblance is doing a lot of work under the surface. The version we use now may be more variable, maybe even more theatrical. But it still seems to rest on an ancient pattern that our ancestors shared with other apes. A Nature News explainer on the paper framed it in much the same way: not as a one-off human trick, but as a trait that kept evolving in parallel with ape social life.
That leaves us with a fairly tidy picture, at least for now. The last common ancestor of great apes probably already had a form of laughter that modern humans would recognize, even if it sounded coarser or less flexible than ours does today. From there, the line toward humans seems to have accumulated more variety, more little vocal flourishes, more room for the laugh to crack, snort, or wobble. Yet the basic package stuck around. Though noisy our own version has become, it still carries the same old rhythm.
Why this matters, and what the study can’t prove
Laughter has always looked a bit frivolous from a distance. Up close, though, it does real social work. People laugh to signal safety, soften tension, reward a joke, or make a room feel less formal. In groups, it can mark who belongs, who’s being teased in good faith, and who just took a small social tumble and survived it. That matters whether the group is a schoolyard, a lab meeting, or a family dinner where somebody has just burned the garlic.
Moving on, What the University of Warwick team has done is give that ordinary noise a much older backstory. If laughter-like rhythms were already present in the last common ancestor of great apes, then human humor doesn’t look like something that appeared out of nowhere, fully formed and waiting for sitcom writers. It looks more like a trait built on a very old primate habit, one that survived because it helped animals manage play, closeness, and the rough edges of social life. The details change from species to species. The function seems to hang around.
A laugh can be light, but the social job it does is rarely light at all.
That said, the study doesn’t claim to have found the first laugh in the fossil record. It can’t. Nobody has a time machine, and apes didn’t leave behind audio files. What the researchers have instead is a careful comparison of living species, then a reconstruction based on what they share. That kind of inference is standard in evolutionary biology, but it’s limits. A pattern that appears in humans, chimpanzees, bonobos, gorillas, and orangutans can point back to a common ancestor. It can’t tell us the exact moment when laughter first emerged, or what social pressure gave it shape.
There’s also a difference between laughter as an acoustic pattern and laughter as human behavior. A child’s giggle, a snort at a bad pun, and a burst of laughter in a tense meeting all ride on the same broad machinery, but they’re not identical events. Humans use laughter in more varied settings, with more layered social meaning, than any other ape we know (to put it mildly). That extra complexity is part of the story too. The study strengthens the case that our humor rests on older primate circuitry, while human life’s kept attaching new uses to it.
So the neat takeaway isn’t that apes were telling jokes fifteen million years ago, or that every laugh has a single origin point waiting to be pinned down like a specimen. It’s messier than that, and more interesting. Laughter seems to be one of those behaviors evolution keeps around because it does useful things in groups. It repairs awkward moments, and it marks familiarity. In short, it can turn a threat into play, or at least into something less grim.
And if you zoom out far enough, the punchline’s simple enough: our giggles may be among the oldest sounds in the hominid playbook.
