The Swiss duo unveiled last week Solar Impulse 2, a revolutionary aircraft designed to achieve the longest ever flight in the history of aviation in terms of duration for a single pilot. It will attempt to fly non-stop for 120 hours (yes, that's five successive days and nights) over oceans and continents without a drop of fuel.
(Jean Revillard/Solar Impulse)
Read the article: A plane that flies forever? Solar-powered flight to take off around the world in 2015