Tech Xplore on MSN
Low-cost sensor system can check indoor air quality in real time
Humans spend about 80% of their time indoors, but keeping track of the air we breathe usually requires expensive lab-grade ...
Perpetual motion devices are either a gag, a scam, or as in the case of this particular toy that [Big Clive] bought on AliExpress, a rather fascinating demonstration of a contact-free inductive ...
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