- 111,111,111 x 111,111,111 = 12,345,678,987,654,321.
- Koalas sleep around 18 hours a day.
- According to the old English time system a moment is 1 and a half minutes.
- Mosquitoes prefer children to adults and blondes to brunettes.
- The diameter of Earth is 12,756 km (7,926 miles).
- Jellyfish don't have a brain.
- Bulletproof vests, fire escapes, windshield wipers, and laser printers were all all invented by women.
- The symbols used for addition (+) and subtraction (-) have been around for thousands of years but it wasn't until the 16th century that most mathematical symbols were invented. Before this time math equations were written in words, making it very time consuming.
- Bernhard Riemann was an influential German mathematician who contributed to differential geometry and analysis, paving the way for the development of general relativity by Albert Einstein.
- Every square inch of the human body has an average of 32 million bacteria on it.
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