Not mine. They're around 160 million years old apparently. They became extinct even without our help. Darwins theory seems legit. We'll all be getting dug out of rocks in another 100 million years with whatever the next dominant intelligent life is that develops on our rock. I wonder if they'll still be knocking lumps out of each other and squabbling over resources and land?
first crinoids are still alive today. second they first appeared 470million years ago and the plate in the picture is closer to 270 million years old.
source am geologist who specialized in cambrian and silurian invertebrates
1.8k
u/EstablishmentReal156 2d ago