Summary: What's the best way to get involved in scientific research from home? Chris Smith and Dominic Ford investigate some of the best citizen science projects which are looking for your help. From categorising galaxies to hunting spiders, mapping your happiness and even discovering the nature of the trillion bacteria in one of your footprints - how will you choose to get involved? Plus, in the news, what a blue whale's earwax can reveal about ocean pollution, Curiosity fails to find methane on Mars, why Raspberry Pi have linked up with Google to boost kids programming skills, and the parasite that stops mice being afraid of cats...
