Researchers have found an ancient shark fossil in Kentucky’s Mammoth Cave, offering new insight into prehistoric marine ecosystems.

1. Mammoth Cave – Kentucky Established as a national park in 1941 and honored as a UNESCO World Heritage Site in 1981, Mammoth Cave boasts the longest known cave system in the world.

Caves are absolutely pitch black, not like a dark night in the forest. There is no light at all. So you can wave your hand in front of your face and see literally nothing. So much like the ...

Wind Cave is among the longest known cave systems in the world, but unlike most massive caves, it isn't spread out over a long distance. Instead, it descends deep down into the earth.

More: Forest Service seeks 20-year block on oil and gas in cave system They can also be sent via mail to 333 Broadway Blvd. SE, Albuquerque, New Mexico, 87102.

Cave rescuers have made significant progress in their attempt to save American explorer Mark Dickey, who got stuck more than 3,000 feet underground when he became seriously ill during a cave ...

American Trapped Deep in Turkish Cave Sparks Rescue Mission Mark Dickey fell ill and has been at a camp about 3,500 feet into the cave By Talal Ansari Sept. 7, 2023 4:51 pm ET Share ...