Mysterious "sonar anomaly" turns out to be 500-year-old shipwreck with massive copper payload

(Natural News) Marine salvagers got a welcome surprise when their sonar picked up an anomaly on the shallow seafloor of the North Sea recently. What they initially mistook for a shipping container turned out to be a sunken Dutch wooden sailing ship from the 16th century. Even better, the 500-year-old shipwreck held tons of copper....

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