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Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

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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 longest a person has survived after a heart transplant is 24 years.

Mother giraffe and calves feeding. It is mostly the females that raise young, and they may gather in Mother giraffe and calves feeding. It is mostly the females that raise young, and they may gather in
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