We were amazed at this to-scale map we found on Tumblr depicting the Mariana Trench, the deepest part of the world's oceans. The trench is located in the Pacific Ocean near the Philippines.

Following is a transcript of the video. Narrator: The Mariana Trench is the deepest point on Earth. So deep that if you dropped Mount Everest inside, its peak would still be more than a kilometer ...

China live-streamed footage of its new manned submersible parked at the bottom of the Mariana Trench on Friday, part of a historic mission into the deepest underwater valley on the planet.