Echolocation: Bats and whales behave in surprisingly similar ways

Sperm whales weigh up to 50 tons, and the smallest bat barely reaches a gram. Nevertheless, the two species share the same success story: They both have developed the ability to use echolocation -- a biological sonar -- for hunting. Now researchers show that the biosonar of toothed whales and bats share surprisingly many similarities -- even though they live in very different environments and vary extremely in size.

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