Hearing and vision have already been digitized - but what about smell? Start-up Osmo has set about teaching computers to detect aromas. It does this by building an odour map: a digital fingerprint that makes any #scent detectable - and even replicable. Osmo can already tell fake sneakers from real ones due to the different smells of the chemicals used. It has created super-powerful new insect repellents. And in future, it says it could even detect Parkinson’s or cancer due to subtle changes in b