Power-producing yarn is the stuff of wearable inventors' dreams. And scientists just created a yarn comprised of carbon nanotubes and submerged in an electrolyte gel that when stretched, generates electricity. The yarn isn't ideal for sweaters - but can harvest power from a wearer's breathing. And there's another surprising application: the yarn could harvest energy from ocean waves.
Related:
https://www.youtube.com/watch?v=Lt2vGlC4uRc
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