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Whistling is a skill used to communicate over distances—a whistle can mean anything from “you’re cute” to “time to come home for dinner.” There’s a complex series of mechanisms in the mouth that need ...
It’s small, inexpensive, doesn’t require batteries or charging, and it could save your life. “In an emergency, a whistle can help rescuers locate you when you can’t call for help,” says Conne Burnham, ...
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