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Did you know?
The horizontal fraction bar was introduced by the Arabs.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Thyroid conditions may make getting pregnant impossible.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
![Daniel Burnham’s Flatiron Building (1902) was one of the first to use steel girders to hold up the b](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_54_224241797.jpeg)
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