The several years various archaeologists have been searching the Black Sea. What they found is archaeological gold. Over 50 ships have been found from the Roman to 10th century Ottoman Empire ship to ships from Venice that dates around the time of Christopher Columbus. What is unique about the finds is that the ships still have the riggings still attached. After the last ice age, salt water entered the fresh water of the Black Sea and eventually created a layer of salt water with no oxygen at the bottom of the sea, which is the perfect environment to keep the ships and their contents intact. This marks the third year of exploration of mapping the bottom of the Black Sea.