Mushrooms are truly magnificent, and this month the team is getting to know them in all their squidgy, slimy and sometimes downright disgusting glory. Is it really true that they could help to save the planet? How can they be used to cure disease? Harvey gets the lowdown. Our philosophical twins, Philip and Phoebe, discuss whether we should regard nature as a guide or a threat, and Polly has a go at farming her own fabulous fungi – it’s going to be spore-tacular.