Cameron: Ocean’s deepest point like an alien planet

After diving to the deepest part of the ocean, filmmaker James Cameron said the last frontier on Earth looked a lot like another planet, desolate and foreboding.

Cameron described his three hours on the bottom of the Mariana Trench, nearly 11km down as a dark, freezing and alien place. He is the only person to dive there solo, using a submarine he helped design. He is the first person to reach that depth, 35,576ft, since it was first explored in 1960.

One of the risks of a dive so deep was extreme water pressure, which was the equivalent of three 4x4s sitting on your toe.