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Bay (left) and chestnut (sometimes called "sorrel") are two of the most common coat colors
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Bladder Campion
Children with disabilities used to be sent to special schools. In a process called mainstreaming or ...
Is this glass half empty or half full?
A square matrix P is called a permutation matrix if each row and column of P contains exactly ...