The Solar Impulse has defied all expectations in its short four-year life.
First, the solar-powered airplane got off the ground in 2010 and stayed aloft for a total of 87 minutes without using a drop of fuel; then, it completed its first international flight traveling from its home of Switzerland to Brussels in about 13 hours. By its first birthday, the plane met the goal of staying aloft for 24 hours -- flying at night with solar energy captured during the day. It has since completed a 1,550-mile journey from Madrid, Spain, to Rabat, Morocco.
Now, before it embarks … Read more