Summary:

- Archaeologists have discovered the remains of a massive medieval ship, known as a "cog," off the coast of Denmark. This ship is the largest of its kind ever found, measuring over 80 feet long.

- The cog was a type of merchant ship used extensively during the Middle Ages for trade and transportation across the Baltic Sea. This particular ship likely sank during a storm around the 14th century.

- The well-preserved wreckage provides valuable insights into the construction and design of these large, wooden sailing ships that were crucial to the economy and trade networks of medieval Europe.