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
LifeOctopuses were thought to be solitary until a social species turned up The discovery of a species of octopus that lives in groups and mates face-to-face is changing our thinking about what cephalopods are capable of Features