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CNN CNN International May 11, 2015 07:45:00

>> well thats the challenge as you understood. in fact. the first time that we will try to cross oceans powered by the sun only. it is easy during the day. of course the challenge to make it through the night. we had to build an aircraft, extremely energy efficient. a demonstration of energy efficiency. thats why it has the size of the 747, the weight not exceeding that of the car. >> why did you decide to do this? what exactly are you trying to prove here? >> to make it feasible, we have used t...
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