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00:00In the 17th century, there was a Dutch merchant named Cornelis Drebbel who claimed to have invented the world's first submarine.
00:07Allegedly, he demonstrated his submersible vessel by diving it under the River Thames in London,
00:13while King James I and a group of spectators watched from the riverbank.
00:17According to reports, the submarine was able to stay underwater for three hours at a time, navigating and resurfacing successfully.
00:24However, the details of Drebbel's submarine design remain a mystery, as no complete working models have ever been found.