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Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Adapoids and omomyoids had longer snouts and are the first “true” primates.
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
Madin-Darby canine kidney (MDCK) cells grown in specialized containers provide a
A lesion called a plaque in the brain of an individual with Alzheimer disease. A ring of degeneratin
A nerve cell (neuron) has extensions called dendrites