Paleolithic people stood before the cave wall, its chalky, smooth rock appealing like a blank canvas, more than 57,000 years ago. Their motives and ideas will always remain unknown. But these imaginative cave-dwellers purposefully...

Paleolithic people stood before the cave wall, its chalky, smooth rock appealing like a blank canvas, more than 57,000 years ago. Their motives and ideas will always remain unknown. But these imaginative cave-dwellers purposefully...