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Researchers raise bats in helium-rich air to check how they sense sound – Ars Technica

Bats seem to have an innate sense of the speed of sound—and can’t adjust it.

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It’s now well-established that bats can develop a mental picture of their environment using echolocation. But we’re still figuring out what that meanshow bats take the echoes of their own vocalizations and use them to figure out the locations of objects.
In a paper released today, researchers provide evidence that bats engage in echolocation in part because they’re born with an innate sense of the speed of sound. How did the researchers study this phenomenon? By…

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