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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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).
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.