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How come onions make you cry? asks reader Jessica R. Elaborate precautions and instructions. Special patented peeling devices. Goggles, with foam seals and anti-fog lenses. Chemical warfare protection, all to produce a slice of something you’ll happily eat on a sandwich. An onion, uncut. Onions are a vegetable that seems to resist being eaten. [...] Why do icicles have pointy ends? asks a reader. Icicles hanging from the roof on a winter’s day look like glittering stalactites, suspended from the roofs of hidden caves. It wasn’t until 2005 that scientists figured out the mathematical formula = that described the shape of stalactites. In 2006, those same University of Arizona scientists [...] |
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