ars technica: In mutation, more is not necessarily better for survival.
Rapid evolution and high mutation. “All told, over 60 different mutant forms were tried, with the most potent mutator creating DNA changes at a rate 1,000,000 times higher than that of the the least mutation-prone. The engineered strains were then subjected to a bacterial version of ‘Survivor’, dumped in culture in various combinations for up to a month in order to see which ones were left alive.”
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