You might have seen solar-powered planes before, but few of them come with as much world-changing ambition as the Solar Impulse. Launched in 2003, the project aims to demonstrate the viability of renewable energy sources by being the first to perform a manned flight around the globe using only solar power. The technology is nothing to scoff at, as the 200-feet wingspan features 12,000 photovoltaic solar cells bringing power to four electric motors. Captain Bertrand Piccard, one of the key men b

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Captain Piccard unveils Solar Impulse HB-SIA solar-powered plane