Mysterious Black Sea ‘dead zone’ where 60 shipwrecks are eerily preserved for centuries
A DEVASTATING diving trip to the wreck of the Titanic left history buffs gutted when it found the monster ship has mostly been lost to the sea.
Even the captain's bathtub, an iconic site from previous dives, has mostly worn away — but there is a mysterious place on earth where shipwrecks stay perfectly preserved for centuries.
As temperatures rose and sea levels increased, saltwater from the Mediterranean began spilling into rivers that fed the Black Sea.
This meant that both freshwater and saltwater rivers now flowed into the Black Sea, resulting in two "levels" of water.
The top layer of less salty water is rich in oxygen, but the lower layer has no oxygen.
This is why the ships have remained so perfectly intact for millennia.
Prof Adams said: "Nobody has seen anything quite like this before."
Historical texts and illustrations have given scientists and historians some clues as to where (and when) the astonishing wrecks came from.
Some of the ships date from the late 800s, when the Byzantine Empire controlled most of the region.
But there are also ships from the Ottoman Empire in the 16th-18th centuries, and a medieval Italian ship most likely from the 1300s.
Most of the wrecks were merchant ships found to be transporting goods like metals, timber and wine.
And one of them boats is among the best surviving examples of a medieval Venetian ship called a "cocha", or round ship.
The boat is believed to have sunk in the 13th century during the height of Venice's golden era, when legendary explorer Marco Polo was documenting the marvels of the world.
Prof Adams remarked: "We know the Italians were quite prominent in the Black Sea in medieval trade, but to see a vessel of a type that might've been recognised by Marco Polo is quite astonishing."
Archaeologists can estimate the origins of the ghostly ruins by looking at the kind of clay pots they were carrying, as well as how the masts and rigging were arranged.
Although some of the ships appear to be "raiding vessels" suggesting piracy, all of them seem to have sank in storms rather than sea battles.
The researchers spent a month on board the Stril Explorer to capture their incredible find in photos and videos.
They then made 3D models of the 60 wrecks, spread out over 2,000 square kilometres, by digitally stitching the images together.