When hundreds of eerily perfect circles were discovered on the bottom of the Mediterranean Sea, theories abounded about what ...

“He released a shimmering trail of tiny microbubbles from his plumage, coating himself with a lubricating layer of air to cut ...

These caves give us a glimpse into the Earth’s ancient history and show off nature’s amazing power and creativity. One of the most famous underwater caves in the world, the Blue Hole is a ...

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 ...

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 ...

In a flooded cave system in the Mexican state of Quintana Roo on the Yucatán peninsula, a manatee mother swims up to cave diver Klaus Thymann, who captured stunning footage and images of these ...

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 ...

Sistema Sac Actun is the world’s largest underwater cave system. Stretching an astonishing 215 miles, this submerged labyrinth of tunnels, caverns, and crystal-clear waterways is not only a ...