|Eocene Penguin from Peru|
Some 35 million years ago, stem penguins were doing something creationists insist never happens; they were transitioning from flying species to aquatic species.
Evolutionary transition is something that any self-respecting creationist will have had lots of practice at denying because examples of it are so abundant in the fossil record - where they shouldn't be if everything was created as is, by magic. So, rather than incorporate these facts into their world view, they retain their evidence-free world view by denying the facts. This is how we know creationism is a dogma, not a science.