There are more nerve cells in one human brain than there are stars in the Milky Way.
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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
A typical engine-driven cooling fan.
Parts of a typical spark plug.
A typical fuel-pressure regulator that has a spring that exerts 46 pounds of force against the ...
A typical two-line cleaning machine hookup, showing an extension hose that can be used to squirt a ...
A typical belt-driven AIR pump. Air enters through the revolving fins behind the drive pulley. The ...