View question - At an ocean depth of 20 meters, a buoy bobs up and then down 2 meters from the ocean's depth.
Manmade Well 20 Meters Down Earth Stock Photo 1632586879 | Shutterstock
Auguste Piccard rode his bathysphere 20 meters down into the Mediterranean Sea in a test dive at Castellammare, near Naples, Italy on August 13, 1953. The Swiss Belgian explorer hopes later to