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Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Herniated disk. A herniated disk is a protrusion of the disk’s gelatinous center, called the nucleus
In this painting evangelist George Whitefield appears to be cross-eyed. This is no fault of John Wol
Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...