Footballs in space, mind-controlled machines and long-lasting bubbles join your questions on this week's Naked Scientists Question and Answer show. We discover the feminine side of prostate cancer and the robot that can walk up walls, and also hear how a computer has designed the next generation of mosquito repellents. Plus, we revisit the Phoenix mission on Mars, and also find out how surfing the internet can contribute more carbon to climate change than surfing the skies in an aeroplane! Plus, in Kitchen Science, Dave demonstrates a psychedelic effect with some milk.