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Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
The pancreas. This organ sits just below the stomach and is both an exocrine and an endocrine gland.
Diphtheria. The bacteria that cause this disease, called Corynebacterium diphtheriae, proliferate in
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Kobe, Japan Liquefaction of soft fill after a 6.9
Eighteen-year-olds were the largest age cohort in the first year of the war in both armies. Soldiers