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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
There are 60,000 miles of blood vessels in every adult human.
Green tea is able to stop the scent of garlic or onion from causing bad breath.