A Moment of Science
“Stone” is actually a misleading word, since we might tend to think of a round, smooth pebble. Although some kidney stones are round and smooth, others are jagged, shaped like tiny starfish.
If you find yourself away from a city, spend an hour looking up on any clear, moonless night. You’re bound to see a few brilliant “shooting stars.” These actually have nothing to do with stars: They’re meteors, and if your viewing conditions are good, you can see about seven per hour on any given night.
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