HealthWhy is coronavirus deadly for some, but harmless in others?To figure out what makes some people more vulnerable to severe cases of covid-19, we need to rethink what we know about infectionFeatures
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