The ancient earthquake detector that puzzled modern historians September 28, 2018 at 05:00PM
Modern seismographs are extremely sensitive pieces of equipment. By recording the slightest movements of laser light or magnets, these devices can detect the smallest of rumbles even when we can't sense them. There are networks of thousands upon thou… from Engadget RSS Feed https://ift.tt/2xXUBRa via IFTTT
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