- Once a women reachs the age of 30 they lose 1% of their bone mass every year thereafter (by the time a women is 50 she will have lost 20%).
- In 1900 the average life span in the US was 47.
- A rat can tread water for 3 days.
- There are over 10 trillion living cells in the human body.
- The word 'geometry' comes from the Greek words 'geo', meaning earth, and 'metria', meaning measure..
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