Profound Thoughts, Courtesy of Prehistoric Art

Above this horse painting are the negative images of two handprints. They were created by a person blowing a black powder pigment onto his or her hands, which were pressed against the wall. The artist then lifted up his or her hands, and these are the images that remained - one left hand, one right hand, from the same person, and created at the same time.

These handprints are from the Peche-Merle Cave in modern-day France.

They are twenty thousand years old.