A Swiss team planning to complete the first round-the-world solar flight next year unveiled a new version of their unique ‘Solar Impulse’ aircraft, which they say could remain in the air indefinitely. (April 9)
A Swiss team planning to complete the first round-the-world solar flight next year unveiled a new version of their unique ‘Solar Impulse’ aircraft, which they say could remain in the air indefinitely. (April 9)
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