The second paper is an in-depth look at genetic changes associated with the evolution of whales and dolphins. They found a lot of devolution.
A study in PNAS has gotten tons of affectionate press, probably because puppies are so darned cute.
Some guy once wrote that there’s nothing new under the sun. He must have had political conservatives’ pro-Darwin arguments in mind.
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.