The Mariana Trench's Challenger Deep—the deepest point on Earth—looks as bleak and barren as the moon, according to James Cameron, who successfully returned just hours ago from the first solo dive to the ocean abyss.After a descent that took roughly two and a half hours, Cameron spent about three hours conducting the first manned scientific exploration of Challenger Deep.
Location of the trench.
Located in the western Pacific east of the Philippines and an average of approximately 124 miles (200 kilometers) east of the Mariana Islands, the Mariana Trench is a crescent-shaped scar in the Earth’s crust that measures more than 1,500 miles (2,550 kilometers) long and 43 miles (69 kilometers) wide on average. The distance between the surface of the ocean and the trench’s deepest point—the Challenger Deep, which lies 62 miles (100 kilometers) southwest of the U.S. territory of Guam—is nearly 7 miles (11 kilometers). .James Cameron on Earth's Deepest Spot: Desolate, Lunar-Like