Microscopic sensors in a spray bottle https://boingboing.net/2018/07/23/microscopic-sensors-in-a-spray.html …pic.twitter.com/etA0xVNQlD
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Microscopic sensors in a spray bottle https://boingboing.net/2018/07/23/microscopic-sensors-in-a-spray.html …pic.twitter.com/etA0xVNQlD