Thread: ELI5: How do we know the Marianas trench is the deepest point in the ocean if we have only explored

ELI5: How do we know the Marianas trench is the deepest point in the ocean if we have only explored (by Sparky)

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(29 / M-F / Massachusetts)
19-Apr-19 7:30 pm

ELI5: How do we know the Marianas trench is the deepest point in the ocean if we have only explored 10% of it?

Yeah

Source.

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