- The original design of Monopoly was circular.
- Dolphins can kill sharks by ramming them with their snout.
- There is no proof as to who built the Taj Mahal.
- One is the only number with letters in reverse alphabetical order.
- That in the 17th century the value of pi was known to 35 decimal places (today to 1.2411 trillion).
- Honey bees kill more people each year than snakes.
- A piece of paper cannot be folded more than 7 times.
- A camel can shut its nostrils during a desert sandstorm.
- In the 17th century Galileo Galilei and Johannes Kepler made important discoveries relating to planetary motion and orbits.
- In 1878 the first telephone book made contained only 50 names.
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