Science Focus
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How to make sparks fly in your mouth
We're issuing a science-based exception to the "don't chew with your mouth open" rule for this one. If you crunch Wint-O-Green Life Savers with your mouth open in the dark in front of a mirror, you should see some sparks start to fly. The light you see is due to a phenomenon called "triboluminescence."
When you chomp down on a mint, your teeth are fracturing crystals of sugar. This fracturing happens all the way down at the molecular level, where chemical bonds are broken. Because of the structure of the sugar crystal, the breaking of these chemical bonds...
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» see original post http://theweek.com/article/index/270821/why-combining-mentos-and-coke-creates-a-sugary-volcano-and-other-cool-candy-tricks
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