EIGHT additional miles of Kentucky’s Mammoth Cave have been uncovered
EIGHT additional miles of Kentucky’s Mammoth Cave are uncovered that extends the 10-million-year-old structure to at least 420 miles long Explorers have uncovered eight additional miles of passageways inside Kentucky’s Mammoth Cave The discovery brings the system to at least 420 miles long and officials say there could be more to find The 10-million-year-old cave was … Read more