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The horizontal fraction bar was introduced by the Arabs.
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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
![Space-filling model of an actin filament (shades of red) with one myosin head (gray and two shades o](https://biology-forums.com/gallery/47/medium_9828_12_01_13_11_13_18.jpeg)
![Three days after the Boston Marathon explosion, the FBI released this photograph that had been taken](https://biology-forums.com/gallery/47/medium_27_24_08_15_1_42_56_22412771.jpeg)