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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.