To coincide with my feature story on the evolution of the eye, the good people at Nat Geo created this wonderful video. It includes a look at some bonus photos from the talented David Liittschwager, and an interview with vision expert Tom Cronin.

As he says, “Other animals don’t see the same things we see. That takes us to a sort of philosophical question: What is the animal actually seeing? It’s impossible to know.”

But we can guess. Take a look: