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
PhysicsJim Al-Khalili's The World According to Physics is a thrilling rideA new book from Jim Al-Khalili makes cutting-edge physics easily understandable and makes it clear why he fell in love with the subject as a teenagerCulture