Richard sits down with British European Space Agency astronaut, Tim Peake, to discuss gravity, guitars, 1980s computers and future missions to the Moon and Mars. Recorded on location at the National Air and Space Museum in Washington DC, Richard also chats to curator Valerie Neal about humanity's 15 years of living off the Earth on the International Space Station (ISS) and whether the ISS could be converted to a starship. And, after a year on a comet, could the Philae lander wake up again? The mission manager is optimistic. Like this podcast? Please help us by supporting the Naked Scientists