A stark limitation to biological computers was that any code programmed into DNA couldn’t be rewritten. UC Davis computer scientist David Doty told Wired that using a DNA computer is “like having to build a new computer out of new hardware just to run a new piece of software.”

But now, Doty and his team have built the first DNA-based computer that can be written and rewritten like any other — a potentially revolutionary leap that could lead to the next generation of biological computing.

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