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Cnidarians have specialized stinging cells called cnidocytes
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Sexual swellings are one way for females to advertise their mating availability, thereby inducing ma
In 1839 Mary Cragin, at the age of twenty-nine, became a convert to John Humphrey Noyes’s “communism
Early in the twentieth century, when malnutrition was common, companies such as this one advertised
An electron is accelerated from rest through a potential difference of 3750 V. It enters a ...