There is simply no way for any unguided, unintelligent account of the unfolding of life to avoid the bane of helpful degradative mutations.
Recently I was asked by several people whether I had ever responded to an old review of my book Darwin’s Black Box.
It’s important to remember that Darwinian factors are indeed real and can have important medical effects, but they only modify life around the edges.
Because of Phillip Johnson’s leadership no informed person will ever again honestly say that Darwin’s theory flows straight from the data.
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.