The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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The average adult has about 21 square feet of skin.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Knee Reflex Test
Coolant circulates through the water jackets in the engine block and cylinder head.
In this design, the fuel injector is at the top of the cylinder and sprays fuel into the cavity of ...
Cylinder Leakage Test
Performing the whisper test
A uniform solid cylinder of radius R and a thin uniform spherical shell of radius R both roll ...