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Swiss Pilot Unveils Solar-Powered Plane for Planned Global Flight

A Swiss pilot unveiled what could be a history-making aircraft Wednesday; the plane is designed to fly around the globe powered only by the sun. The Solar Impulse 2 will begin test flights next month in preparation for a planned around-the-world trip next year. The plane has the same wingspan as a jumbo passenger jet, but only weighs about as much as a large car. That is because instead of heavy fuel tanks, Solar Impulse 2 is powered by more than 17,000 solar cells, grabbing energy...

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