Blood is approximately twice as thick as water because of the cells and other components found in it.
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The average adult has about 21 square feet of skin.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Changes in the Level of Education, 1975-2010
The Gram-Schmidt Process for Finding an Orthonormal Basis
Special Triangles
Pt.1 (special triangles)
Pt.2 (special triangles)
A theoretical explanation of the biochemical basis of the four eye color phenotypes