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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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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.
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The human body produces and destroys 15 million blood cells every second.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.