They were rolling in the deep. Scientists have identified what could potentially be the “deepest known blue hole” in the world, extending so far down that the bottom has not yet been reached.

From the air, it looks like an ink spill in turquoise water, a perfect circle that seems to drop straight into the planet. For decades, Belize’s Great Blue Hole has pulled in explorers, filmmakers and ...

Far from the open ocean trenches, divers in a shallow Mexican bay have found a vertical portal into the unknown. The Taam Ja’ Blue Hole plunges so far beneath Chetumal Bay that scientists have not yet ...

Add Yahoo as a preferred source to see more of our stories on Google. cientists have identified what could potentially be the "deepest known blue hole" in the world -- which extends so far down it's ...