Why are billionaires racing for space? What is the UK's Covid-19 strategy since freedom day? And how will Covid-19 affect the Olympics? This week it's QnA time, and with us to explore where weightlessness begins, whether animals other than mammals suckle their young, if recent findings of methane mean life on Mars, and why the UK isn't vaccinating kids against Covid, are Richard Hollingham, Linda Bauld, Eleanor Drinkwater and Dan Gordon. Plus, an Olympic-themed quiz to boot! Like this podcast? Please help us by supporting the Naked Scientists