guises writes: By making a giant petri dish out of bands of increasingly antibiotic-laced agar, a couple of microbiologists have created a means to watch bacterial evolution as it happens: colonies introduced to the dish expand to fill the areas in which they can survive and then mutate and spread into the areas in which they can not. It takes only eleven days for the bacteria to evolve sufficient resistance to survive in an area with a thousand times the concentration of antibiotics that would have killed the original colonies. And it makes a pretty neat video.
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