"We were unable to locate any original casts and were concerned that exposure to the sun and decades of seasonal rains may have destroyed the original fossil prints." One of the first major hurdles as the scientists began this research "was our difficulties trying to track down original casts of the Laetoli A prints from their initial discovery," study lead author Ellison McNutt, a biological anthropologist at the Heritage College of Osteopathic Medicine at Ohio University, told Live Science.
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