Here are the top 10 caves in the USA that deserve a spot on your bucket ... Mammoth Cave boasts the longest known cave system in the world. Its 420+ miles of charted passageways feature incredible ...

Drones could address the biggest challenges in these fights, like a lack of situational awareness and communications problems ...

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...

Having been first discovered in 1960, the Nutty Putty cave system was renowned for its narrow and winding passages. Although it was widely dubbed as a good 'beginner cave' for explorers ...

Known for its narrow and winding passages, the Nutty Putty cave system was popular among cavers and those with an adventurous nature - like John - and thousands made their way to the spot every year.

They had crawled into Cave of the Winds, deep inside a cave system known as Clearwater, where they would search for a passage to Racer Cave, part of the Racer-Easter system. Connecting the two ...