Unobtainium is the exotic metal or other material that is needed to make the Applied Phlebotinum work. Much mad science uses unobtainium, such as imaginary chemicals with impossible properties or super-strong alloys that cannot be made from common earthly metals. Alien spaceships and weapons are usually made from unobtainium as well. See Also: Minovsky Physics when the Unobtainium has well-thought-out properties that are strictly adhered to, and Green Rocks, which can be thought of as pure unobtainium ore. Compare Mineral MacGuffin and Spice of Life. Examples of Unobtainium include: