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Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
These older adults are participating in an exercise class at their assisted-living facility
Cardiac catheterization. Insertion of a tube called a catheter through a blood vessel. In this examp
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Sociologists use income, education, and occupational prestige to measure social class. For most ...
Corbel Vault, Interior of Tholos, The So-called Treasury of Atreus