Whales are held up as a model of what unguided evolution can do in a short time: in this case, just 8 million years, or perhaps even half that.
Prominent atheist biologist Jerry Coyne calls whale fossils “one of our best examples of an evolutionary transition.”
Charles Darwin wrote: “I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits…”
Considering several recent papers shows that eliminating evolutionary words and concepts simplifies and improves scientific explanations.
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.