Cave explorers discovered eight miles of tunnels at Mammoth Kave, bringing the total length of explored passageways in the world’s longest subterranean system to 420 miles. The Mammoth Cave National Park and the Cave Research Foundation announced the underground discoveries as cavers continue to explore the vastness of the cavern system while verifying past research. The exploration and surveying of Mammoth Cave have been going on for more than 100 years. Maps of the cavern and it continue to be redefined and enlarged, thanks to the efforts of many volunteers who are committed to professional cave exploration. “Caves are one of the last frontiers on Earth that are still being explored. They are hidden from view from satellites and cannot be mapped or scanned from the surface or with the assistance of robots, at least not yet,” Derek Bristol, a cave enthusiast, told The Epoch Times. “We must have the human …
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