Bacterial spam mail

History dictates that Alexander Fleming will be best remembered for his discovery of penicillin, what with him winning the Nobel Prize and all. Perhaps what he should be remembered for, however, are the paintings he made on agar using different coloured bacteria. Quite why this culturally important art form never caught on is anybody’s guess.

It may have been Fleming’s strange hobby that inspired a group of scientists to go one stage further and develop an encrypted messaging system (obviously), which uses printed patterns, known as arrays, of different coloured bacteria. These bugs are coloured by the expression of genetically engineered fluorescent proteins, and the scientists in question have called the system ‘steganography by printed arrays of microbes’, or (ahem) SPAM for short…