Quote

We march toward annihilation
under the banner of Realism.
~Richard Barnet ~

 Almanac

Mercury is a metal. It has the unusual characteristic - for a metal - of being liquid at room temperature. Mercury sees many uses, from dental fillings to fungicides to various industrial processes.

Mercury in a bottle
Image via Wikimedia Commons.

Mercury is also poisonous. It is a neurotoxin and, at high enough doses, can damage the brain or even cause death.