Why can’t you swim straight up in the ocean?
As you ascend, water pressure decreases, and the air in your lungs expands. This can make the air sacs in your lungs rupture and make it hard for you to breathe. If air bubbles get into an artery, they can cause a blockage that affects your organs. The blockage is called an arterial gas embolism.
The deepest point ever reached by man is 35,858 feet below the surface of the ocean, which happens to be as deep as water gets on earth. To go deeper, you’ll have to travel to the bottom of the Challenger Deep, a section of the Mariana Trench under the Pacific Ocean 200 miles southwest of Guam.
So if you were using PADI’s suggested ascent rate of 18 meters per minute, then it should take you 2.6 minutes, at the quickest, to swim up from a depth of 47 meters.
Why do we only know 5 of the ocean?
With space exploration, scientists can see everything that’s in front of them, using telescopes. With ocean exploration, we’re can’t see very far. Light doesn’t permeate deep into open water. … In short, we’ve only explored 5 percent of the oceans, because exploring the depths is so treacherous and difficult.
After the aphotic zone, there’s complete darkness. From 1,000 meters below the surface, all the way to the sea floor, no sunlight penetrates the darkness; and because photosynthesis can’t take place, there are no plants, either.
How much of the earth is still unexplored?
The extent of human impact on these underwater ecosystems is impressive. Still, we’ve only mapped 5 percent of the world’s seafloor in any detail. Excluding dry land, that leaves about 65 percent of the Earth unexplored.
The pressure from the water would push in on the person’s body, causing any space that’s filled with air to collapse. (The air would be compressed.) So, the lungs would collapse. … The nitrogen would bind to the parts of the body that need to use oxygen, and the person would literally suffocate from the inside out.