Darwin and his descendants couldn't have asked for a better example of how you make scientific predictions and how you verify them in a very rigorous way.

We're living through a historic revolution in biology.

This is telling us about those changes that make us human.

Evolutionary analysis is a handmaiden to human medicine.

That's a very specific prediction.

The goal is not just butterfly collecting or mammal collecting to simply describe mammals. All of that comparative work across mammals is about informing the human genome for medicine. Until we actually understand all the working parts within our genome, we won't really be able to practice the most informed medicine.