Former Republican President Ronald Reagan is widely recognized as one of America's best presidents for economic expansion. But his party's overall economic track record isn't nearly as sterling. Michael Evans/The White House/Getty Images.
Superheated water is liquid water under pressure at temperatures between the usual boiling point, 100 Â°C (212 Â°F) and the critical temperature, 374 Â°C (705 Â°F). It is also known as subcritical water or pressurized hot water..
The average temperature of deep-ocean water is only 2Â°C (36Â°F). The water coming directly from a hydrothermal vent can reach up to 350Â°C (662Â°F) and is rich in dissolved chemicals. The hot spring water forms a plume above the vent, somewhat like smoke rising from a chimney into the air.