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The human body produces and destroys 15 million blood cells every second.

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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.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Ludwig Mies van der Rohe, Farnsworth House, Fox River, Plano, Illinois. Ludwig Mies van der Rohe, Farnsworth House, Fox River, Plano, Illinois.
Beta Ghiorghis (House of St. George), Lalibela, Ethiopia. Beta Ghiorghis (House of St. George), Lalibela, Ethiopia.
The engine is rotated until the timing marks on the front of the crankshaft line up with zero ... The engine is rotated until the timing marks on the front of the crankshaft line up with zero ...
Mechanisms That Lift Air: Warm front example Mechanisms That Lift Air: Warm front example
Cold front Cold front
House and tree House and tree
Video: Factors that increase metabolic rate and heat production

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