WASHINGTON (AP) -- The world's rich and famous will soon explore Earth's lost frontier, starting with "Titanic" director James Cameron.
Cameron and others hope to dive in tiny submarines to the deepest part of the ocean, which hasn't been visited by people in more than 50 years. It is the Mariana Trench in the South Pacific. It's almost 7 miles at its deepest point. It's so deep there that the pressure is the equivalent of three SUVs parked on your toe.
In the next several days, Cameron plans to reach the bottom of the trench in a one-man sub that he helped design.
Entrepreneur Richard Branson is not far behind. Former Google CEO Eric Schmidt is funding another deep water submarine project that's still on the drawing boards.