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April 12, 2019 09:00 am -04

This four-inch antenna could let you text from deep underground

There's a reason that scuba divers use sign language and that caves and tunnels create radio dead zones. The laws of physics prevent radio signals from penetrating materials like water, soil and stone, and that's been a frustrating limitation of mode...

Original Link: https://www.engadget.com/2019/04/12/slac-antenna-vlf-radiation/

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Engadget

Engadget is a web magazine with obsessive daily coverage of everything new in gadgets and consumer electronics. Engadget was launched in March of 2004 in partnership with the Weblogs, Inc. Network (WI

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