We use cookies to ensure that our site works correctly and provides you with the best experience. If you continue using our site without changing your browser settings, we'll assume that you agree to our use of cookies. Find out more about the cookies we use and how to manage them by reading our cookies policy.
Recent advances in miniature devices suggest the futuristic vision of medical nanobots – so-called ‘bloodstream submarines’ – patrolling our bodies to detect and repair injury or deliver drugs may be closer than we think, Michael Gross reports.