Neanderthal 'hashtag' carving found in cave

The hashtag may be a symbol of modern life, but its origins can be traced back to Neanderthal carvings.  Scientists have discovered the first evidence of artwork by this species etched into the walls of a cave in Gibraltar.  In recent years researchers have discovered that Neanderthals buried their dead, adorned themselves with black and red pigments, wore shell and feather jewelry and cared for the elderly and infirm, all evidence of complex thought.  But until now, no unambiguously Neanderthal art was ever found.