As Halloween approaches, children — and more than a few adults — are deciding on their costume for this spooky holiday of ghosts, goblins, candy, and horror flicks. Skeletons have always been a staple costume, whether it’s a glow-in-the-dark bodysuit variety or a mask or makeup job largely hidden by an oversized hood on a Grim Reaper outfit. As for the other 364 days of the year, real ones have long been put on display for the devout to revere, and fake ones for Mexican communities to celebrate on the Day of the Dead. Skeletons and skulls have been depicted in art or gravestones for centuries as a symbol of our finite time on earth, fighting a guaranteed losing battle against the sand hourglass. They could be positively frightening (say, in the promotional poster for the movie Evil Dead 2) or rather amusing (as in a Scooby-Doo episode). However you react to them, they invariably promise the same denouement: The end is always near. Read more about the top five skeletons and skulls in the world >