Nine-year-old Ethan, 7-year-old Evan and 10-year-old Sebastian regularly spent time looking for antique bottles and other items around what was once a railroad line along the edge of their family's property.
But that day they and two uncles found the bone instead. Tom Goodwin, a professor of paleobiology at Andrews University, identified it as a vertebral section from the lower back of a Jefferson's mammoth.
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