
DNA on the Walls: Ancient Human Clues Found in Prehistoric Rock Art
Scientists retrieved ancient human DNA from calcite crusts on cave walls and pigment on rock art across 11 caves in Spain and Portugal, a first that could someday help identify the artists behind prehistoric paintings. DNA was found in 24 painted panels, though only a few samples yielded usable ancient DNA, and ages are uncertain—likely at least a couple of thousand years old. The DNA may have been deposited via saliva or fluids during art creation, and some samples from unpainted cave areas also contained human DNA. While it raises exciting possibilities, researchers caution that it isn’t yet sure the DNA belongs to the artists, and future work will refine methods and expand sampling to more sites.












