A stunning photograph, with much to think about. It wandered around the internet a couple of years ago, and it’s good enough, it’s going around again.
It’s an x-ray of a stingray. Consider what Charles Darwin might have thought about such an image. It’s a species discovered only in the last decade, imaged by a means of photography not known to be possible until more than a decade after Darwin’s death. What would he make of the discovery of a species, and the ability to see inside the thing, showing the cartilaginous skeleton (compare with the rays’ cousins, the sharks), and showing the organs Darwin knew would be there if evolution was, in fact, accurate.
21st century science brings such beauty: