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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.
![One ear forward and one ear back, corresponding to where horse is looking with each eye, usually ind](https://biology-forums.com/gallery/47/medium_27605_22_04_12_7_16_13.jpeg)
![Tense laid back ear position indicating unhappiness. Mouth and lips are also tense, which may indica](https://biology-forums.com/gallery/47/medium_27605_22_04_12_7_16_35.jpeg)