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Did you know?
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.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.