Stretching 18 km between Denmark and Germany, this €7bn immersed tunnel is the world’s longest road and rail link. By 2029, ...

Living beneath the waves has long captured the imagination of dreamers, designers and explorers, inspired by tales like Atlantis. Today, with rising sea levels and a growing curiosity about what lies ...

Far below the waves off the coast of Brittany, France, divers have mapped a massive stone barrier that should not exist, at least not according to the standard story of early European prehistory.

The remarkable tunnel beneath the Baltic Sea, expected to become one of the world's longest underwater structures, is due for ...

The Fehmarn Belt Fixed Link is an immersed tunnel set to link the Danish island of Lolland with Germany's Fehmarn island.

A team of researchers has recovered the deepest sample ever taken of the Earth’s mantle from a section of seafloor in the Atlantic Ocean. At more than three-quarters of a mile in continuous length, ...

Mexico’s Tam Ja Blue Hole has been confirmed as the world’s deepest, reaching at least 1,380 feet. Scroll down to know what ...

Below ocean wind farms, oil rigs and other offshore installations are mammoth networks of underwater structures, including pipelines, anchors, risers and cables, that are essential to harness the ...

In 1995, divers first noticed a group of bizarre sandy "crop circles" on the seabed around Amami Oshima Island, southwest ...