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Hide Secret Messages in Bacteria

Secret messages can be hidden in genetically engineered bacteria.

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A new method called steganography uses an assortment of E. coli strains modified with fluorescent proteins that glow in seven colors.

Multiply that number by the two colors each message character is encoded with, and you have more than 49 possible code combinations. That's enough for the alphabet, plus digits 0 to 9, with room left over for a few extra symbols.

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