“Uh, let’s see. I can see a rock wall…and another rock wall, and then what looks like a small pool of water. Come rescue me.” A 16-year-old invented a low-frequency antenna capable of relaying text messages from cavers to the earth’s surface. The team went down 946 feet to set the record for sending the deepest digital communication. Now we just need to retrofit it with a personal locator beacon so rookie cavers can request rescue when they get lost.

via Engadget

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