How many shipwrecks are lying on the ocean floor?

Q: How many shipwrecks are lying on the ocean floor?

3 million shipwrecks (3,000,000). Three million, by UNESCO's estimate. Fewer than 1% have ever been explored. Source: UNESCO

3 million

shipwrecks

3,000,000 exactly, give or take

Three million, by UNESCO's estimate. Fewer than 1% have ever been explored.SOURCEUNESCO

Scale check: 3 million is roughly everyone in Birmingham.

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