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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 [...] How come in cold weather your nose runs and your eyes tear? Also, how come when you put milk on puffed rice cereal, it makes a popping sound? asks Emily Abrams, a student at Long Island Lutheran Middle School, in Brookville, NY. Winter is notorious for its dry air. And yet, when it comes to [...] |
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