- Greek mathematics developed from around the 7th century BC, producing many important theories thanks to great mathematicians such as Pythagoras, Euclid and Archimedes..
- Some dinosaurs had tails over 13m (45 feet) long.
- The first aluminum drink can was introduced in 1964.
- The average person sheds .7kg (1.5 pounds) of skin each year.
- Brazil covers 50% of the South American continent.
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