Researchers from MIT and Brigham and Women’s Hospital invented a small voltaic cell that runs on the fluids in your stomach. The device could power sensors that would stay in your gastrointestinal tract for an extended period, monitoring vital signs or delivering drugs. Similar sensors today have to be powered by small batteries, which create a safety risk and eventually run out of power.
Three Earth-like planets Astronomers found not just one but seven planets outside our solar system that circle a tiny star called TRAPPIST-1, about 40 light-years away. Three are in what NASA calls the habitable zone, which could be right for water to exist and possibly for extraterrestrial life. Think you know all there is to know about earth now? Take this quiz to find out.
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