Buried underpants and a new definition of kissing win 2026 Ig Nobel prizes

The recognition and prestige of a Nobel prize for ground-breaking work comes with a gold medal and the equivalent of a million dollars. The parody version, an Ig Nobel prize, devised to celebrate research that makes people laugh, and then think, might not deliver on the cash front, but it does bring considerable renown.

This year’s Ig Nobel prizes were awarded on 3 September at a ceremony in Zurich, Switzerland. They include a biomechanics prize for creating a precise definition of kissing, which works across species and excludes the transfer of food during the act¹, a physics award that aims to please with experiments to design a splash-free urinal² and a soil-science award for investigating what happens if you bury and then dig up 1,000 pairs of underwear³ (see ‘The 2026 Ig Nobel prizewinners in full’).

“I hope that, as well as finding the research amusing, people will come away thinking a little differently about our place in the animal kingdom,” says Matilda Brindle, an evolutionary biologist at the University of Oxford, who was a co-author of the kissing study. “My jaw hit the floor when I got the phone call. It’s certainly one of my proudest life achievements.”

Smooching with Neanderthals

Brindle’s team steamily defined kissing as a “non-agonistic interaction involving directed, intraspecific, oral–oral contact with some movement of the lips/mouthparts and no food transfer”. According to this definition, polar bears, some birds and even ants kiss. What’s more, not only do other primates also snog each other, but the team also traced the behaviour back around 21.5 million years to the ancestor of all the large apes. This means that ancient Homo sapiens would probably have been smooching Neanderthals.

“We’ve shown that animals kiss and when it could have evolved in the primates; the obvious next step is understanding why. If this award helps spark more curiosity about this sort of question, then that’s a pretty wonderful outcome,” says Brindle.

Levitating frogs

Previous winners of Ig Nobel prizes have included researchers who studied the preferred pizza toppings of rainbow lizards in Togo⁴, the levitation of live frogs using magnets⁵ and research showing that London taxi drivers have particularly large hippocampi in their brains⁶.

In the prize’s early days — it was launched in 1991 by Marc Abrahams, editor of the satirical magazine Annals of Improbable Research — receiving an Ig Nobel prize was deemed insulting by some, but now many researchers see the awards as a great career boost.

How a silly science prize changed my career

“The visibility they bring is enormous. It exposes research to audiences that would never otherwise encounter it,” says Changhong Cao, a mechanical engineer at McGill University in Montreal, Canada, who is part of the team that won this year’s technology prize for showing that a mosquito’s mouthparts can be repurposed as a nozzle for high-resolution, low-cost 3D printing⁷.

Cao says that the work shows that even things that people find unpleasant can turn out to be useful — sometimes in the most unexpected way.

Another example of unpalatable items coming in handy is the work of Franz Bender and Marcel van der Heijden at the University of Zurich, who were the researchers responsible for the underwear-burial study. They enlisted citizen scientists from more than 25 nations to bury the garments and dig them up two months later, which provided insight into how biologically active the soil was.

Like candy from a baby

Other awards this year include the physics prize for a team that experimentally validated what makes fluid splash back from urinals and suggested redesigns that could cut the spray to just 1.4% of what is commonly experienced.

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