Physicists reveal the secret to chopping onions without crying

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Physicists reveal the secret to chopping onions without crying

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Cutting onions can be a tearful experience

Foster.r/Getty Images

If you find yourself crying when chopping onions, physicists have found a possible solution – but professional chefs probably aren’t going to like it.

When onions are cut open, they spray a mixture of sulphur-rich compounds into the air, one of which is syn-propanethial-S-oxide, a chemical that triggers the nerves in the eye responsible for producing tears.

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at Cornell University in Ithaca, New York, and his colleagues used a high-speed camera to analyse in detail the spray produced when…

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