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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

David Hume (1711‑1776) was a Scottish philosopher whose skeptical examinations of religion, ... David Hume (1711‑1776) was a Scottish philosopher whose skeptical examinations of religion, ...
David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today. David P. Bradley (White Earth Oijbwe, and Mdewakaton Dakota), Indian Country Today.
Preschool and child care afford opportunities for many new experiences but also can be stressful for ... Preschool and child care afford opportunities for many new experiences but also can be stressful for ...
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Video: Bone processes - resorption and deposition, remodeling and response to stress in adult bones

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