The Makapanset Pebble may represent the earliest known expression of aesthetics by ancestors of humans. Left in a cave nearly 3 million years ago it was miles away from any possible source. The shape is definitely natural so the theory is a proto-human found it in a riverbed, recognized the shape of a face, and decided to keep it for that fact.
Hmm, I sure have been drawing an awful lot of decapitated and otherwisemutilated monsters lately, hmm. I’m sure there’s a perfectly reasonable subconscious reason for this that isn’t weird and disturbing.