Scientists have announced the discovery of what they describe as the world’s deepest blue hole, off the coast of Mexico. Taam Ja’ Blue Hole (TJBH), is located in Chetumal Bay off the Yucatan ...

It's also thought that the new discovery has a depth of 274 meters! Blue holes are submerged springs and sink holes, most of them form in limestone rock, which can be very porous - meaning it has ...