Why are stars and planets round? Could a helium balloon ever continue into space? Is the moon bombarded with asteroids? Is it possible to create a flying saucer? We answer these questions on this week's Ask the Naked Scientists. We'll also investigate the future of our evolution, reveal why spiders don't stick to their webs, andfind out why soap stings our eyes so much! Like this podcast? Please help us by supporting the Naked Scientists