Mercury (element)

Mercury, also quicksilver or hydrargyrum, is a chemical element with the symbol Hg and atomic number 80. A heavy, silvery d-block metal, mercury is one of six chemical elements that are liquid at or near room temperature and pressure, and is the only metal that is liquid at standard conditions for temperature and pressure. With a melting point of −38.83 °C and boiling point of 356.73 °C, mercury has one of the narrowest ranges of its liquid state of any metal.

Mercury is used in thermometers, barometers, manometers, sphygmomanometers, float valves, and other scientific apparatus, though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alcohol-filled, digital, or thermistor-based instruments.

Mercury in "Vilcabamba"
The Krolp effectively strip-mined the whole of Spain to get at mercury deposits miles below the surface.

President of the United States Harris Moffatt III remembered this incident, and opted to fight the Krolp rather than allow them to strip-mine for silver within U.S. territory.