- The most sung song is happy birthday.
- Bulletproof vests, fire escapes, windshield wipers, and laser printers were all all invented by women.
- Acorns are poisonous to humans (if eaten it can cause damage to your kidneys).
- The surface area of a brick is 79 cm squared.
- Cucumbers are 96% water.
- You can't tickle yourself.
- In the 17th century Galileo Galilei and Johannes Kepler made important discoveries relating to planetary motion and orbits.
- 99% of our solar system's mass is the sun.
- Europe is the only continent without a desert.
- The diameter of Earth is 12,756 km (7,926 miles).
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