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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
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![Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...](https://biology-forums.com/gallery/27/medium_482573_20_04_17_1_00_31_27949851.png)