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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
The human body produces and destroys 15 million blood cells every second.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.