- Cows can walk up stairs but not down them.
- A Sphygmomanometer measures blood pressure.
- The meaning of 'Blue Chip' comes from blue casino chips which have a high value.
- Spiders have transparent blood.
- 1 googol is the number 1 followed by 100 zeros.
- The average woman will consume over 2.7kg (6 pounds) of lipstick in their lifetime.
- Diamonds are the hardest natural substance.
- Lion's can't roar until the age of 2.
- The yo-yo was originally used as a weapon for hunting the in the Philippines.
- The Eiffel Tower is over 300m (984 ft) tall.
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