Oceans

Which underwater machine helps humans travel around beneath the surface of the ocean?

More Questions from Oceans
In what year did the International Whaling Commission declare blue whales to be a protected species because of a huge decrease in their population?
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What fish is named for its long, sharp, toothless jaw?
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The Arctic Ocean is in which direction from North America?
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Which of these is the smallest of the world's oceans?
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What is oceanic crust?
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In what year did the Deep Sea Drilling Project begin?
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What does a Nictitating membrane on a shark do?
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Which species is known as the Devilfish?
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