Blue holes are among the least understood features of the ocean floor. From the surface, they can appear ordinary, even calm, blending into the surrou.

The deepest blue hole in the world has reportedly been found. However, scientists have no idea what lies at the bottom of it, ...

The deepest blue hole in the world lies just off the coast of Mexico and scientists have been left perplexed. This underwater marine sinkhole is over 420 metres deep and explorers are still unable to ...

A massive underwater sinkhole off the coast of Mexico has swallowed every instrument scientists have lowered into it, and they still have no idea how far down it goes. The Taam ja’ Blue Hole, sitting ...

The co-founder and former CEO of OceanGate, the deep sea exploration company whose submersible notoriously imploded on a dive to the Titanic wreck last year, is heading back to the bottom of the ocean ...

The Taam ja’ is blue hole is still defined by what we don’t know. We can say it’s deeper than 1,390 feet, and the bottom hasn’t been found.

A diver’s view looking up to the opening of the seafloor hole known as Amberjack Hole, which was explored last year. Image courtesy of Mote Marine Laboratory/AJ Gonzales Tales of the ocean swallowing ...

A year after the OceanGate submersible disaster, the company's co-founder is planning another excursion into the deep blue, this time into a "virtually unexplored" sinkhole. Guillermo Söhnlein founded ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Sinkholes are natural depressions that form when rock ...