Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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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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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
Two women having a conversation using American Sign Language.
Water Loss Through Evaporation
Milestones of Infant Language Development
Vocabulary Development in English Monolinguals (EL1) and English Language Learners (ELL)
Photo of a sign taken at an emissions test facility.