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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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 first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.