Why do onions burn your eyes?

We’ve all been there: you’re in the kitchen, cutting onions for your signature pasta sauce when, all of a sudden, your eyes start burning. You wipe away the tears, and keep cutting, trying your hardest to hold them back. Despite your best attempts, tears begin to pour from your face as if your favourite television character was just killed off. All of this occurred simply because of an onion. But why? What makes this vegetable so potent, and why does it hold such a dominion over you? Simply put: onions…

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