redOrbit: Swiss adventurer, Bertrand Piccard, revealed on Friday the prototype of a solar powered plane that he plans to use as he embarks on an around the world flight demonstrating the possibilities of alternative energy. The prototype, HB-SIA, has the wingspan of a jumbo jet but only weighs as much as a mid-sized family car. The plane is powered by four electric motors and is designed to fly both day and night by storing extra energy from its 24,000 solar cells in high-performance …