MathematicsThe mathematician who doesn’t exist A secret society of French mathematicians has been revolutionising the field of mathematics under a pseudonym for nearly a century. Columnist Jacob Aron finds that this mythic collective provided maths a rigorous and useful foundation, and did some real harm along the way Comment
HealthWe may finally have a cure for many different autoimmune conditions A revolutionary cancer treatment is now being applied to a wide range of autoimmune disorders. Columnist Michael Le Page finds it is proving to be even more effective than expected Comment