Solar Impulse is a unique plane, powered not by jet fuel, but solar energy and it is currently on a record-breaking tour around the world. But how does that plane work and what is it like to fly? What happens when the sun begins to fade and the nigh falls over the ocean? Can a solar plane keep flying? Lucka Bibic caught up with co-pilot Andre Borschberg to ask about his green aviation mission. Like this podcast? Please help us by supporting the Naked Scientists