- 'Bookkeeper' and 'bookkeeping' are the only 2 words in the English language with three consecutive double letters.
- Babylonians measured the circumference of a circle as approximately 3 times the diameter, which is fairly close to today's measurement which uses the value of Pi (around 3.14)..
- The expression to 'knuckle down' originated from playing marbles (players used to put their knuckles to the ground for their best shots).
- Chalk is made from tiny plankton fossils.
- Less than 20% of shark attacks are fatal.
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