There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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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 FDA recognizes 118 routes of administration.
Sunlight on Mars is dimmer than on Earth. This photo of a Martian sunset was imaged by Mars Pathfind
Piaget was one of the first to go beyond observable behavior in an attempt to determine how infants ...
This advertisement from about 1885 represents an early stage of capitalism when individuals were ...