Aviation
The Solar Impulse, flying from Phoenix to Dallas this week, set an absolute distance world record for solar-powered aviation. The departure from Phoenix was picture...
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The Solar Impulse, flying from Phoenix to Dallas this week, set an absolute distance world record for solar-powered aviation. The departure from Phoenix was picture...
What has the wingspan of a 747, weighs no more than a small car and can fly day and night without ever refueling? I...