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" ... ...that biologists discovered unusual patterns in the bacterial DNA, in which a sequence of DNA would be followed by nearly the same sequence in reverse, then 30 or so seemingly random bases of "spacer DNA," and then a repeat of the same palindromic sequence, followed by a different spacer DNA. A single microbe could have several such stretches, each with different repeat and intervening sequences. This pattern appears in more than 40% of bacteria and fully 90% of microbes in a different domain, the archaea, and gives CRISPR its name. (It stands for clustered regularly interspaced short palindromic repeats.) ... "