Aviation
What has the wingspan of a 747, weighs no more than a small car and can fly day and night without ever refueling? I...
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What has the wingspan of a 747, weighs no more than a small car and can fly day and night without ever refueling? I...
We've covered the birth and growth of this completely solar-powered plane from Switzerland, the Solar Impulse, here on CleanTechnica. The most recent news is...