The deepest deep sea dive possible is to the bottom of the Challenger Deep in the Mariana trench. When was the first (and last) manned dive to this depth?
(40 points)
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Nuclear submarines are powered by nuclear reactors on board. How many nuclear submarines are currently sunk on the ocean floor?
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There is land under
(30 points)
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What canal was built to create a water passage between the Atlantic and Pacific oceans?
(20 points)
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