
Food & Chemistry
Why Do We Cry When Cutting Onions?
Cutting an onion releases a chemical gas that reacts with the moisture in your eyes to form a mild acid. Your eyes water to flush it out.
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Biology & Neuroscience
Why Do We Blink?
Blinking lubricates your eyes, clears debris, and may give your brain a brief processing reset. We do it 15 to 20 times per minute without noticing.
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