The Taam Ja’ blue hole, a massive underwater chasm in Chetumal Bay on the eastern coast of Mexico’s Yucatán Peninsula, has ...

Researchers have found a blue hole they say is the deepest in the world—and they’ve yet to find where it bottoms out. The ...

America might have landed on the moon, but Russia drilled the deepest man-made hole on Earth. Since the early 1960s, scientists have attempted to drill down to the Earth's mantle. It took 20 years ...

I organized a series of expeditions to investigate new deep caves, using dye traces in cave streams to probe Arabika’s potential depth. In 2001 a team led by Ukrainian Yuri Kasjan set a world ...

Enormous crater appeared suddenly in part of Russia, Yamal, where name translates as 'the end of the world' Some thought the rare and unusual structure, which was up to 300ft (70 metres ...

Chinese researchers discovered what they say is the deepest blue hole in the world, off the disputed Paracel Islands in the South China Sea. The sinkhole was measured at 1,000 feet, deeper than ...

Running at a staggering depth of 3,891 metres down and 2,062 metres below sea level, a colossal mine in Africa is the deepest and richest gold mine in the world. Mponeng gold mine began producing ...

I glance at my guide, Brian Kakuk—one of the world's foremost cave divers ... From a protected cove on Long Island, Dean’s Blue Hole—Earth’s deepest known underwater cave—plunges ...