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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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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Illicit drug use costs the United States approximately $181 billion every year.

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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Letter from a Person with Pure Alexia Letter from a Person with Pure Alexia
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th In the summer of 1793, a yellow fever epidemic struck Philadelphia, killing nearly 4,000. Tens of th
Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many Edward Bellamy, author of the utopian novel Looking Backward (1888) Bellamy’s socialism worried many
Infants often rely on a caregiver as a secure base when they meet a new person. Infants often rely on a caregiver as a secure base when they meet a new person.
The flow of energy and the cycling of materials maintain nature’s organization The flow of energy and the cycling of materials maintain nature’s organization
Video: Hydrogen bonds - role in the body

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