- The first metered taxi was introduced in 1907.
- 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..
- The fingerprints of koala bear are indistinguishable to that of a human.
- Wind doesn't make a sound until it blows against an object.
- The average human drinks over 60,566 litres (16,000 gallons) of water in a lifetime.
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