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LiveScience
LiveScience
Lydia Smith

Colossal cave in Mexico that formed 15 million years ago is even more enormous than we thought

Mexico Earth Oaxaca
Explorer Brad Wuest descending into an entrance pit in the Sistema Huautla cave system in Mexico.  (Image credit: Chris Higgins)

The deepest cave in the Western Hemisphere — the Sistema Huautla in Mexico — is even longer than originally thought, scientists and cavers have discovered.

Cave explorers expanded the map of Sistema Huautla, a cave system in the Sierra Mazateca mountains in the southern Mexican state of Oaxaca, by 728 feet (222 meters). This means the known length of the cave is just over 62.7 miles (100 kilometers) — but further exploration may reveal it is even longer.

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