The solar-powered airplane Solar Impulse can fly day and night without fuel. Inventors Bertrand Piccard and André Borschberg hope to fly it around the world in 2015. While the plane flies all day by solar power, it gathers enough energy to be able to fly all night. When the sun rises, Piccard says, “It brings the hope again that you can continue.”
via Our Daily Bread http://ift.tt/1ujcTnq
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