How echolocation lets bats, dolphins, and even people navigate by sound
Dolphins, porpoises, and other toothed whales have mastered echolocation thanks to unique anatomical structures. DEPOSIT PHOTOS In an environment without light, or where sight is otherwise useless, some creatures have learned to thrive by sound. They rely on calls, clicks, and twitters to create a kind of map of their surroundings or pinpoint prey. That ability is called echolocation, and a simple way to understand how it works is to crack open the word itself. What is echolocation? Imagine an echo that locates things. The sound hits an object and bounces back, relaying information about a target’s whereabouts or cues for navigation. When Harvard University zoologist Donald Griffin coined the word “echolocation” in the journal Science in 1944, he was describing how bats rely on sounds to “fly through the total darkness of...