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Experience the Tear Inducing Power of an Onion Try Holding One
Science June 26, 2026

Experience the Tear-Inducing Power of an Onion: Try Holding One!

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New Scientist: Your source for the latest in science, technology, health, and environmental news.


Feedback is New Scientist
— a popular outlet for readers keen on keeping up with the latest in science and technology. Share your thoughts at feedback@newscientist.com.

Exploring the Science of Onions

Feedback doesn’t require professional chef skills to understand that cutting onions can lead to tears. While the kitchen can be a high-pressure environment, the many chefs who cry at the sight of onions aren’t alone.

The tears you experience while chopping onions come from a chemical called sympropanethyl-S-oxide, released into the air. This compound activates the trigeminal nerve and causes your tear ducts to react, which is why onion slicing often ends in a watery-eyed struggle.

This raises intriguing questions: Is sensitivity to onions universal, or does it differ between individuals? Furthermore, do those who react more strongly to onions also possess heightened sensitivity to other chemicals, like scents? The answers remain unclear.

As Thomas Hummel and his team noted in their preliminary study published on May 25th in the Journal of Laryngoscope Investigation Otorhinolaryngology, there is surprisingly little research on this topic.

Hummel’s study involved 1,001 participants, who rated their olfactory abilities and their propensity to cry while cutting onions. Testing also included identifying scents using specially infused sticks.

Interestingly, those who reported more tears while cutting onions claimed to have a better sense of smell, but psychophysical tests painted a different picture. In fact, individuals who said they were affected by onions performed worse on smell tests.

These findings suggest that self-evaluation of one’s sense of smell is often inaccurate, much like people’s tendency to overestimate their abilities in driving or interpreting complex information.

Luckily, Feedback doesn’t suffer from such misconceptions. With a nose like ours, it was clear when a dead mouse, hidden by one of our cats behind the sideboard, finally wafted its distinct odor into the air.

Organizing the Digital Library: A New Gaming Trend

Feedback acknowledges that video games have shifted from epic battles to more mundane tasks. Titles like Animal Crossing revolve around everyday life activities such as village upkeep.

Enter Librarian: Organize the Arcane Library, launched on April 30th. Players are tasked with restoring order to a chaotic library filled with mischief caused by whimsical fairies, needing to systematically shelve 3,072 books.

This game is priced at £5.29, and while Feedback has yet to play it, the aesthetics of organizing chaos seem appealing, much like solving a Sudoku puzzle.

Player reception is positive, with nearly 15,000 reviews logged as of June 16th, 94% of which praise the game. There appears to be a surprising joy in tidying up havoc in the digital world, a stark contrast to real-life messes where odds and ends are often neglected.

Reflections on Youth and Technology

Feedback has observed that emerging trends like booing speakers advocating for generative AI among university graduates are becoming more common. Figures like Eric Schmidt and Scott Borchetta have felt this backlash.

As we ponder the underlying reasons behind the youth’s disdain for technology—often associated with deepfakes, job displacement, and electrical consumption—let’s keep in mind the wisdom of Principal Seymour Skinner: “Am I really that out of touch? No, it’s the children who are wrong.”

Got a story for Feedback?

Reach out via email at feedback@newscientist.com, including your location. Explore this week’s feedback and previous editions on our website.

Source: www.newscientist.com

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