““This is direct evidence of evolution. We share so much with our placental mammalian cousins because we all had a common ancestor around 70 million years ago. Our understanding of medicine, blood types, the central nervous system, and where we ultimately came from are all direct results of our understanding of evolution. If we did not have a common ancestor, if we did not share DNA sequences, if we had not all descended from ancestral living things, all of life science, all that we see living in nature would be far, far more mysterious and hard to understand. That the essential discovery of evolution was made barely a century and a half ago indicates for me how primitive we all must still be. We are only now starting to use our knowledge of living things, gained through the study of natural selection, to become more compassionate toward our fellow humans and better stewards of Earth. We have a long, long way to go. It’s exciting to contemplate.””
