10 Deep Sea Mysteries Scientists Still Can't Explain

All right, let's go. Number 10, the Lost City Hydrothermal Field. In December 2000, oceanographer Deborah Kelley and her team aboard the research vessel Atlantis were exploring the Atlantis Massif, an underwater mountain in the middle of the Atlantic Ocean, roughly 900 miles east of Bermuda. What they found 2,600 feet beneath the surface should not have existed. Towering white carbonate spires, some reaching 200 feet in height, rising from the seafloor like a drowned cathedral. The formations were alive, venting warm alkaline fluids into the cold Atlantic water, and coated in microbial mats that pulsed with a form of life unlike anything in the biological record. They called it the Lost City.