In 2003 Bertrand Piccard, a Swiss adventurist, had the idea to fly around the world in a plane powered by the sun. Seven years later his prototype plane landed at Zurich airport. The authorities closed the airport down for about 20 minutes so that the plane could land safely without interferences from other planes. The plane, which weighs as much as a car and has four 10 horsepower electrical engines, landed without making any sound, which was in stark contrast to the noisy jet-planes starting before. Seeing the plane land with about 50km/h right in front of my eyes was a highlight of 2010!
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