echolocation
Geek Out

Before Radar, Militaries Used Gigantic Headphones For Land-Based Sonar

Radar is wonderful, sure, but militaries didn’t always have the benefit of radar to pinpoint enemy locations. Before that, there was sonar. Underwater is one thing, though. On land, you needed big victrola-like contraptions that looked uncomfortable as all hell.

May 22, 2011
Science

This Man Who Sees With His Ears

Daniel Kish lost his eyesight when he was 13 months old. For most of his youth, he functioned fine without a walking stick. He mountain bikes. He camps alone. He moves through cities handily. All thanks to advanced echolocation abilities.

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