Strange New World—The Ocean

Joel Achenbach writes about the grand opening of the Smithsonian Institution?s Ocean Hall. An excerpt:

The ocean?s deepest point is about seven miles down. The hall?s project manager, Elizabeth Musteen, says only ten human beings have ever been deeper than 3 1/2 miles below the surface?which means that the ocean trenches have been explored by fewer people than have explored the moon.

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