Mercrelium (Ml) is a chemical element that was discovered on a space exploration to Jupiter on December 7, 1995. The element was extracted from the surface of Europa—one of the 67 moons of the planet Jupiter.

Mercrelium shares a few physical characteristics with another metal found on earth—Mercury. In the proper conditions the two are undistinguishable to the naked eye. The metallic element is of silver color, and its physical states vary on external environmental factors, such as temperature. At temperatures at or below 35.6 degrees Celsius the metal is in a liquid state. At the temperature of 37 degrees Celsius and above, Mercrelium becomes solid and forms an impenetrable layer.

Observations have concluded that the element Ml is highly attracted to Calcium and bonds on contact. The element is most stable when bonded to calcium, and will remain bonded until the source has been fully depleted. If handled without proper protection, Mercrelium can permeate the epidermal and muscular tissues, and bond with the calcium found in bones. Once bonded, the layer of metal will not obstruct normal bodily functions.

Studies and experimentation with the metal are being conducted, in order to discover possible medical uses. A study is currently being administered on patients with severe osteoporosis; the findings are extremely encouraging. These findings give hope for possible future use on patients with severe skeletal deterioration and degeneration diseases. So far no studies have found the metal to be toxic to humans, unless ingested, as it will obstruct breathing once hardened.