‘Your scientists were so preoccupied with whether they could,’ says Jeff Goldblum’s character in Jurassic Park, ‘they didn’t stop to think if they should’. These, among the wisest of that fictional oracle’s many wise words, are what came to mind as I read of a whizzy new pan-European science project called Odeuropa. Historians and chemists in Holland, Germany, Italy, France and Slovenia along with colleagues at UCL and in Cambridge, have spent two years, apparently, working to synthesize the smells of the past.