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Muskox populations remain in the Arctic all year, though they migrate to higher elevations in the wi
Major trunk lines carrying long-distance traffic crisscrossed the area east of the Mississippi. The
Early in the twentieth century, when malnutrition was common, companies such as this one advertised
Polyps, or abnormal growths, on the lining of the large intestine may indicate early stages of colon
Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy
Early stages of embryonic development in Drosophila