Record Now, Smell-Back Later

Imagine being able to record any smell you encounter — fragrant or foul — so you can play it back later for others to experience. Engineers in Japan are building an odour recorder capable of doing just that. The device uses electronic noses to analyse an odour, then reproduces it by combining an array of non-toxic chemicals. The system has already recorded and reproduced the smell of orange, banana and melon — and can even distinguish red and green apples