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(COURTHOUSE NEWS) – Prehistoric footprints that have puzzled scientists since the 1970s are getting a second look: Were they left by extinct animals or by human ancestors? When famed paleontologist Mary Leakey first uncovered the footprints in Tanzania 40 years ago, the evidence was ambiguous. Leakey focused her attention instead on other fossil footprints that…

Or Hesperopithecus haroldcookii, Nebraska man, and woman that scientist's determined from one pig's tooth.

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