Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
They pay the divers to go to the end of the ocean and measure the ocean floor depth before divers dive they take a long endless string keep it up the surface then take it al the way down and cut to where it ends so that when they are finished they measure
about 1,000
Natural gas can take millions of years to form. It is created from the decomposition of organic matter, such as dead plants and animals, under high pressure and temperature deep beneath the Earth's surface.
Future models of Deep Flight may be able to carry scientists to 11,000 meters below the ocean's surface.
500 to 1,000 years
It takes approximately 2 to 2.5 hours to descend to the bottom of Challenger Deep, the deepest known point in the Earth's seabed, using a submersible. The return trip to the surface takes a similar amount of time.
It takes about an hour to deep fry an 18 lb turkey!!
Manly swimmers and divers will take showers afterward meets, practices, etc. because to get the chlorine out of hair.
Depends on your speed.
5 years
they can go 1000 meters down !!! . but they have to have a tree near them Additional: There have been navy tests in cambers which divers have been under pressure to simulate dives to 2000 feet. Since most of the body in made up of uncompressable water in theory a diver could go to unlimited depth as long as the air he is breathing is reduce in oxygen and nitrogen to keep him from convulsing. And at a high enough pressure so his lungs would be equalized.. Question is how long would it take to come back up from deep deep "dive" with all the decompression needed. Tim