Human echolocation works step by step

Navigating the world as a blind person sometimes involves using a cane, guide dog or wearable GPS system. For some, this toolkit includes echolocation. Producing tongue clicks and listening for echoes can be enough to gain information about nearby objects. But even for expert echolocators, a single click is rarely enough to perceive an object….

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Novel approach to clearing brain waste shows promise for Alzheimer’s

A scanning electron micrograph of a mouse nerve cell that is affected by misfolded versions of the proteins amyloid and beta, which are thought to drive Alzheimer’s disease LINNEA RUNDGREN/LINEAR IMAGING/SCIENCE PHOTO LIBRARY Interest is growing in using the brain’s waste-disposal system to delay or ease Alzheimer’s disease. Now, a new technique that helps clear…

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