Richard Lenski claims that his experiment provides “one of the most direct demonstrations of Darwinian adaptations by natural selection you can imagine.”
Perhaps the biggest evolutionary development in the course of the experiment involved some bacteria beginning to feed on citric acid.
Dr. Berlinski questions evolutionary understandings of language and expresses doubt as to what reproductive benefit could have accrued to “the first guy to master the Greek subjunctive.”
Professor Lenski revisits a series of experiments on the bacteriophage lambda begun by his lab around 2012.
Lenski agrees that the beneficial mutations seen in his Long Term Evolution Experiment are overwhelmingly degradative or loss-of-function ones.