The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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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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The horizontal fraction bar was introduced by the Arabs.
Virtual reality exposure therapy
In Second Life, multiplayer online game, two avatars engage in virtual courtship.
Early-maturing boys tend to be advantaged because they often fit cultural ideals of masculinity.
Active solar technologies use for heat, cool, and produce electricity