Great piece from Popular Science that highlights the excellent work of young inventor Ann Makosinski.
A friend in the Philippines was failing school; without electricity, she couldn’t do her homework at night. So Makosinski devised a flashlight powered by the heat of your hand. It uses peltier tiles, which generate electricity when one side is hotter than the other, to draw energy from the heat difference between hand and air. Makosinski submitted her invention to the 2013 Google Science Fair and won first place in her age group.
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