Pluto, first discovered in 1930, looked nothing like it looks today:
Oh. You were expecting this?
And, amazingly, we now have our first historic glimpse of what are believed to be carbon-based biological life-forms on Pluto, photographed by the New Horizons mission:
No one knows yet if these specimens, dubbed “Plutonicons“, are sentient beings, as we only have photographs to go by. While they do look a little like smiling humanoid heads, the project’s scientists’ initial cautious analysis says, in part, “…it could be just a trick of the light and shadows.”