'Live Evolution' Not Witnessed After All by Brian Thomas, M.S.* Some science media outlets are hailing a recent study as “live evolution witnessed,” but what researchers at the Centre National de la Recherche Scientifique actually saw isn’t evolution at all. They observed, over the course of 300 generations, predator bacteria adapting to overcome certain defenses erected by its prey. The kinds of minor changes that these bacteria experienced, however, do not support the broad Darwinian philosophy that life continually evolves upward...