earth mounds

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Mysterious Mounds Attributed to New Source

Theory about soil, erosion may not be sexy, but it's convincing

(Newser) - The mystery of the mounds lives on. A mere six months after researchers said computer modeling proved pocket gophers , over the course of several hundred years of scurrying and burrowing, formed the bizarre-patterned earthen "Mima mounds" in Washington state, a new team of researchers claims that plants are in...

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