- Diamonds are the hardest natural substance.
- The opposite sides of a die always adds up to 7.
- The average human drinks over 60,566 litres (16,000 gallons) of water in a lifetime.
- Clothes dried outside smell better because of a process called photolysis (sunlight breaks down compounds that cause odor).
- It takes 17 muscles to smile and 43 to frown.
- Women blink twice as much as men.
- Your most active muscles are in your eye.
- Apples are more effective at waking you up in the morning than coffee.
- Before 1850 golf balls were made of leather and were stuffed with feathers.
- A newborn kangaroo is about 1 inch in tall.
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