Caves

Professor Clive Finlayson who led the expedition, said it was "quite a feeling to know the people who were last in there were Neanderthals."

Thanks to the discovery by researchers, the Mammoth Cave system in Kentucky now officially has 420 known miles of passages.

The cave—which had water pouring from its ceiling covered in stalactites—stays the same temperature all year round.

The hoax video hit over six million views and claimed to have found "new creatures" in caves in Thailand, but the true story behind the clip was very different.

The footage capturing the imposing feel of the cave's interior reveals the lava tube is "much larger than assumed."

As the hole deepened, I began to imagine how I could take advantage of the space, and in 2017 I decided that I wanted my own cave. I imagined creating huge rooms and arched ceilings.

The lava tube was examined by members of the Oregon High Desert Grotto caving club, who say there are areas of the cave that have yet to be explored.

Andrés Cantó has plans to expand his cave and says it will eventually have WiFi, heating and lighting.

The $550,000 four-bed, three-bath home was built in 1926, and is referred to as a the Plummer Pump House.

Less than 180 miles from Cancun's spectacular beaches lies a mysterious dark cave home to a species of blind, deaf snakes that feed mainly on flying bats.

In the countdown to its 300-year-anniversary, Ruinart is adding a modern spin to its 800-year-old chalk cellars.

Caves have an almost primal appeal—they hold the secrets to our past and are the last vestige of exploration.

Each of the boys was sedated with ketamine and their hands were tied during the rescue extraction mission.

Dr. Pak Loharnshoon of the Royal Thai Army visited the group on Monday while they recovered at a hospital in Thailand.

All 12 boys of the Wild Boars soccer team and their coach have been evacuated to safety.

Petty Officer Saman Kunan ran out of oxygen while negotiating the cave's narrow tunnels.

The team will either have to learn to dive in treacherous conditions or wait four months for the waters to recede.

The treasures are at risk of ruin, the researchers warn.

When the crocs reach their full size, they become trapped inside the caves for the rest of their lives.

The cave stretches more than 200 miles.

There's no other way to access these unexplored areas than to strap on your scuba tanks and jump in.

Among the thousands of artifacts were fossilized skeletons of rabbits, sheep, donkeys, rhinos, bears and birds.

The first two modern human cultures coexisted for many years, but until now it's been unclear if one was borne from the other.

For as much as it might reveal about ancient island cultures, the art itself is incredibly tiny.

The caves have eerily straight walls and ceilings, and sections are full of water.

The humpback golden line barbel also has a mysterious little horn.

Subterranean spiders serve as harbingers of environmental dangers to come.

A newly discovered inch-long millipede has more legs than the chorus line at Radio City Music Hall.