Monday, September 20, 2021

Explorers add 8 miles to world's longest known cave system

Explorers add 8 miles to world's longest known cave system
Mammoth Cave National Park has set a new record. The world's longest known cave system just set a new record after surveyors spent hours mapping an …

* This article was originally published here. * * * * * Visit Al Cannistra Flipboard Curations here.

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