It had been five hours since my intrepid robot Gilligan left its garage on the front of the submersible Mir 1 and disappeared inside the cavernous shipwreck. Our sub was parked on the upper deck ...

You can see the damage for yourself in an upcoming documentary on the expedition, Mission Titanic, set to air on National ...

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an ocean explorer for whom discovering the wreck of the Titanic was only one of many highlights over a 45-year career with National Geographic. We caught up with him to hear more about his life ...

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