That fluid is bile, a substance produced by the liver and stored in the gallbladder that aids in the digestion of fats. If youâre suffering from chronic heartburn or have been diagnosed with GERD that is not responding to treatment, bile reflux may be the source of your problem.
Lighthouse Reef as seen from space. The Great Blue Hole is near the center of the photograph. The Great Blue Hole is a giant submarine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, over 300 m (984 ft) across and 108 m (354 ft) deep.
There is a 9.1km borehole in Germany, part of the Continental Deep Drilling Project (KTB), but deeper still is the 12.25km Superdeep hole in the Kola Peninsula near the Arctic Circle in Russia, drilled between 1977 and 1989. The latter is roughly 0.4% of the distance (2,900km) to the core of the earth.