Make sure your grandma’s fingernails and toenails are nicely trimmed before she’s cremated. According to Norse lore, a bunch of dark stuff called Ragnarök is going to go down, ending in a huge battle where the gods die and the world is destroyed. During the battle, a vengeful army will arrive on a giant ship called the Naglfar, or nail ship. That’s right, an entire battleship made out of the fingernails and toenails of dead people. So if you don’t want Grandma’s nails to contribute to the fall of the universe, get out the clippers and snippy-snip.