Context to underwater depths

The Deepwater Horizon well is nearly a mile deep in water. It extends 3.5 miles. It’s hard to imagine these depths of the ocean though since most of us have never gone further than twenty feet below. The New York Times’ Bill Marsh provides some context. The Titanic rests 2.4 miles down, while in 1960, a U.S. Navy submersible descended to the deepest known ocean floor, about 7 miles into the darkness. [Thanks, Peter]

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