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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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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Everyone has one nostril that is larger than the other.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
Cellular changes associated with short-term and long-term memory in the sea slug.