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A computer made from DNA can compute the square root of 900
https://www.newscientist.com/article/2228461-a-computer-made-from-dna-can-compute-the-square-root-of-900/?utm_source=digg
Chunlei Guo at the University of Rochester in New York state and colleagues developed a computer that uses 32 strands of DNA to store and process information. It can calculate the square root of square numbers 1, 4, 9, 16, 25 and so on up to 900.