Swiss adventurer, Bertrand Piccard, has unveiled a solar powered plane in which he plans to cirumnavigate the globe. Built by Solar Impulse, the plane has a 63.4 metre wing, is built of light weight carbon fibre and carries enough batteries to keep it flying overnight. The wings have the span of a jumbo jet are covered with 12,000 solar panels but weigh less than half a tonne. The plane is expected to make its first flight this year.
