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Author Question: Professional cleaning and polishing of the teeth done to prevent disease and tooth decay is known as ... (Read 56 times) |
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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.