Slender as a stick insect, a solar-powered experimental airplane with a huge wing span completed its first test flight of more than 24 hours on Thursday, powered overnight by energy collected from the sun during a day aloft over Switzerland.
Source: http://www.nytimes.com/2010/07/09/world/europe/09plane.html?_r=1&hp
Human Powered Vehicles - one of my passions. Check the transformer bike
If you haven’t please watch this video about Mother Earth. It will make you think.
