- Mathematical developments increased rapidly around the time of the Italian Renaissance in the 16th century and continued through the scientific revolution of the 17th and 18th centuries, becoming increasingly abstract in the 19th and 20th centuries.
- Oak trees don't produce acorns until they are 50 years old.
- 20% of China's plants are used in medicine.
- An office desk has 400 times more bacteria than a toilet.
- The Empire State Building in New York weighs over 365,000 tons.
- Brazil borders every country in South America except Chile and Ecuador.
- In 75% of American households women manage the money and pay the bills.
- The most popular snack food is potato chips.
- The color of a chicken's earlobe is a good indicator of the color of the eggshell it will lay.
- Venus is the only planet to rotate clockwise.
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