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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Blood is approximately twice as thick as water because of the cells and other components found in it.
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).