A Neanderthal seems to have left a message etched in stone about 35,000 years ago, a new study finds. An analysis of the slanted, zigzag lines — engraved on a piece of flint discovered at a Neanderthal site in Crimea — reveals that they likely weren't made willy-nilly. Rather, the Neanderthal artist would have needed excellent fine motor skills and attention to detail to etch the lines, which may carry symbolic meaning, the researchers said. If this new interpretation is correct, the engraved piece of flint will join a growing list of artifacts showing that Neanderthals were likely complex beings...