- Archimedes of Syracuse lived around the year 250 BC and played a large role in the history of geometry including a method for determining the volume of objects with irregular shapes.
- The world's biggest pyramid is not in Egypt, but in Mexico.
- The word 'karate' means 'empty hand'.
- A group of jellyfish is called a smack.
- Sun light can penetrate clean ocean water up to a depth of 73m (240 feet).
- A group of rhinos is called a crash.
- 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.
- Useful life of a modern toilet is 50 years.
- The word 'uncopyrightable' is the is the only 15 letter word that can be spelled without repeating any letter.
- Sea water is approximately 3.5% salt.
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