"The famous paintings on the walls of caves in Europe mark the beginning of figurative art and a great leap forward for human culture."

"But now a novel method of determining the age of some of those cave paintings questions their provenance. Not that they're fakes — only that it might not have been modern humans who made them."

"The first European cave paintings are thought to have been made over 30,000 years ago. Most depict animals and hunters. Some of the eeriest are stencils of human hands, apparently made by blowing a spray of pigment over a hand held up to a wall."

"But now scientists are suggesting those aren't human hands, at least in some caves in Spain."