The geology teacher spent most weekends exploring and mapping the island's complex system of underwater caves. "Mallorca is much more beautiful underground than above ground," he says. Pere ...

In the rest of the post, the diver describes how he explored the ‘terrifying underwater cave system, armed only with snorkel gear.’ A caver had a scary encounter when he, along with his team ...

A group of divers have connected two underwater caverns in eastern Mexico to reveal what is believed to be the biggest flooded cave on the planet, a discovery that could help shed new light on the ...

The Sac Actun cave system on Mexico's Yucatán Peninsula contains many wonders, from a 13,000-year-old skeleton to human artifacts and fossils of giant sloths. It's also part of the Yucatán ...

In a flooded cave system in the Mexican state of Quintana ... But there is hope, says Thymann, and documenting this dense habitat of underwater caves may be the first step in protecting the ...

Beneath the land surface of the Bahamas, the underwater caves known as blue holes stretch for hundreds of miles in all directions. Today, these labyrinthine passages host a variety of tiny sea ...

Our goal was to map one of the world’s unique ecosystems: underwater caves, aka “blue holes.” Their biogeochemistry creates hot spots for extremophile life-forms. They also contain fossils ...

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level ...