- Paper money was first used in China.
- Rainbows can only be seen in the morning or late afternoon (the sun needs to be less than 40 above the horizon).
- On average 22% of all restaurant meals include potato chips.
- Triscadecaphobia is the fear of the number 13.
- Dreamt is the only word that ends in mt.
- Birds cannot live in space because they need gravity to be able to swallow.
- Gatophobia is the fear of cats.
- The atomic symbol for iron is Fe (the original name for iron was Ferric).
- Spiders have transparent blood.
- Cats can hear ultrasound.
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