LifeLife's other mystery: Why biology's building blocks are so lop-sidedMost molecules exist in mirror-image forms, and yet life prefers one over the other. How this bias began and why it persisted is one of the most baffling questions in biology – but now we have an answerFeatures
EarthThe best new books, films and games to enjoy in 2020 Wondering what to read, watch and see this year? Here's our cracking cultural calendar of the most interesting non-fiction, films, games, events and sci-fi in 2020 Culture