(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 ...

Florida is home to an underwater cave system that attracts divers, yet this is one of the most dangerous sites in the world.

Beneath the land surface of the Bahamas, the underwater caves known as blue holes ... this boa species still lives on the island. The cave swallow (Petrochelidon fulva) is a small, stocky songbird ...

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 ...

Take a deep breath and dive below the surface with cave-diving experts and scientists in the video above. Find out what it takes to plunge into the dark and mysterious world of underwater caves. Caves ...

Would you explore the murky depths of an underwater cave in search of venomous creatures? Museum researchers take on the risk and enjoy the challenge. Cave diving can be the ultimate thrill, but it is ...