Jason Lewis was 26, broke and cleaningwindows when he and a college friend decided to embark on an adventure around the world using only human power, one of the last great firsts to conquer.
Some of the earliest applications of nanomaterials have been in products such as stain-resistant fabrics, self-cleaning windows and harder-wearing tennis balls, but more and more are turning up in cosmetics and skin lotions such as sun-blockers.