Bats are known, in part, for making an infernal racket that helps them navigate, but it turns out they may actually flap around in relative silence when traveling in groups.
It's only for a microsecond, but the bats may actually take turns shutting up so they can listen to the leader and avoid the confusion caused by too many signals at once, new research suggests.
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http://www.foxnews.com/story/0,2933,410661,00.html