With a high-speed camera and a tiny guillotine, scientists showed that chopping onions slowly and with sharper knives cuts down on tears.

Stressed out by hot-button issues? Politicized science? Chemistry Lessons From Hell? Relax. Here are some quirky chemistry tricks that require little brain power. I've even explained how they work.

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People often want to cherish their childhood memories but fail to recall their favorite moments after many attempts due to ...