Lynn first saw the roadrunner! Then said, "Oh, it's a footprint." It's the footprint of an enormous, feathered, ostrich-looking bird like the moa. Datewise, this is from approx. 4000 B.C. (Fossilization can happen faster, depending on the matrix.) The bird is now extinct. (As you look at the original footprint, you can see where the claws on certain toes sunk into the mud.)
Image #4: SOHO Space Blobs
Backstory: What the heck are these things, captured by the SOHO satellite aimed at the sun? Archons? Ships? Spirits? Cosmic one-finger bowling balls??