- The number Pi (the ratio of the circumference to the diameter of a circle) can't be expressed as a fraction, making it an irrational number. It never repeats and never ends when written as a decimal.
- The hydrochloric acid found in your stomach is strong enough to dissolve a nail.
- The first sport to be filmed was boxing in 1894.
- Russia and the United States of America are less than 3 miles apart.
- Commercial airplanes maintain a cabin pressure of about 6,400 feet (just over 1 mile) above sea level.
- John Cadbury founded the Cadbury chocolate company in England in 1842 producing the first chocolate bars.
- A King Cobra is the biggest of all poisonous snakes and can grow to over 4 metres (13 feet) long.
- An individual blood cell takes about 60 seconds to make a complete circuit of the body.
- Chimps can develop their own fashion trends.
- The night vision of tigers is 6 times better than humans.
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