The average office desk has 400 times more bacteria on it than a toilet.
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There are 20 feet of blood vessels in each square inch of human skin.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.
A partially submerged alligator displaying a typical ambush position
Energy flows in a typical gasoline-powered car
A mother dies, a father loses his leg—such calamities shattered poor urban families. Orphaned street
A typical ratchet used to rotate a socket. A ratchet makes a ratcheting noise when it is being ...
The sensing wire in a typical hot wire mass air flow sensor.