Using a remotely controlled submersible archaeologists have discovered the world's oldest intact shipwreck at the bottom of the Black Sea. It is of an ancient Greek cargo vessel. It is so well preserved that even some of the rope has survived. However, they fear that it is too fragile to raise intact using current technology.
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https://www.theguardian.com/science/...m-of-black-sea
https://www.dailymail.co.uk/sciencet...Black-Sea.html