Bats Have Superfast Muscles—A Mammal First: "Found in some songbirds and snakes, superfast muscles in bats occur in the throat and enable a crucial hunting behavior: echolocation, in which the bat sends out sound waves and listens for echoes bouncing off prey.
As a bat closes in on an insect, the mammal emits more than 160 calls a second, a phenomenon called terminal buzz."
Maybe some human beings are trying to evolve into bats.
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