From the article Solar plane en route to everlasting flight:

For the first time a solar-powered plane has flown through two consecutive nights, UK defence research company QinetiQ claims. In a secretive weekend mission, their craft Zephyr took off from a US military base in New Mexico and landed 54 hours later.

Check the handlaunch!

Simpler, lighter, more efficient. Exciting stuff. Soon I think we’ll see one of these things fly ’round the world, following the sun, perhaps… but then again, maybe not!