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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

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There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent
Early in the twentieth century, when malnutrition was common, companies such as this one advertised Early in the twentieth century, when malnutrition was common, companies such as this one advertised
During my research in India, I interviewed this 8-year-old girl. Mahashury is a bonded laborer who ... During my research in India, I interviewed this 8-year-old girl. Mahashury is a bonded laborer who ...
The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ... The remarkably complete skull of a 3-year-old Australopithecus girl; the fossil is 3.3 million ...
Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ... Prevalence of drug use in the United States. Figures are based on a survey of people 12 years of age ...
Concentration affects where the precipitin line forms. When 1 reactant is held at a constant ... Concentration affects where the precipitin line forms. When 1 reactant is held at a constant ...
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