- 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..
- The 'you are here' arrow on maps is called an ideo locator.
- That after petrol, coffee is the largest item bought and sold.
- If you filled a matchbox with gold it could be flattened into a sheet the size of a tennis court.
- Australia has the largest sheep population.
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