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1. The King of Hearts is the only king in a deck of cards without a mustache.
2. There's enough gold inside Earth to coat the planet
3. Dead skin calls are a main ingredient in household dust
4. Earwax is a form of sweat
5. Dolphins sleep with one eye open
6. There are more than 8000 varieties of grapes
7. A group of hippos is called a bloat.
8. A cat's jaw cannot move sideways
9. Hummingbirds are the only animals that can fly backward.
10. The unicorn is the national animal of Scotland.