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Early submersibles were dangerous and could remain underwater for only a few hours at a time. How did Robert Ballard solve this problem
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Early submersibles were dangerous and could remain underwater for only a few hours at a time. How did Robert Ballard solve this problem

User Nick Bradbury
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1 Answer

9 votes

Answer:

He designed a remote-controlled submersible.

Step-by-step explanation:

User Sebastian Dengler
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