- Red light has the highest wavelength.
- 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%).
- Sun light can penetrate clean ocean water up to a depth of 73m (240 feet).
- In 1878 the first telephone book made contained only 50 names.
- The diameter of Earth is 12,756 km (7,926 miles).
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