A blue hole in the sea near Mexico is so deep that humans have yet to reach its bottom. It also has certain conditions that ...

Far below the turquoise surface of the Caribbean, an almost perfectly circular patch of dark water drops away so sharply that ...

In 2000, Russian-Israeli Yuri Lipski bravely ventured into the Blue Hole, huge marine cavern, off Egypt's coast but he soon ...

Yuri Lipski, a Russian-Israeli scuba diver, plunged into the Blue Hole in the Red Sea off Egypt's coastline and never ...

Deep in the ocean, mysterious blue holes are drawing sharks from miles away. Scientists are racing to uncover what makes ...

Yuri Lipski's helmet camera captured his final moments at Egypt's Blue Hole in 2000 after he declined expert warnings about ...

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 ...

For more than 60 years, the ginkgo-toothed beaked whale (Mesoplodon ginkgodens) was one of the ocean’s greatest mysteries.

Worldwide, millions of people live in river deltas that are sinking faster than sea levels are rising, research suggests.

Some of the world’s biggest megacities are located in river deltas threatened by subsidence due to excessive groundwater ...