- The bones of a pigeon weigh less than its feathers.
- The equals sign (=) was invented in 1557 by a Welsh mathematician named Robert Recorde..
- Sun light can penetrate clean ocean water up to a depth of 73m (240 feet).
- Hawaii officially became apart of the US on June 14 1900.
- Greek mathematics developed from around the 7th century BC, producing many important theories thanks to great mathematicians such as Pythagoras, Euclid and Archimedes..
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