- Plutonium is a chemical element; it has symbol Pu and atomic number 94. It is a silvery-gray actinide metal that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon, and hydrogen. When exposed to moist air, it forms oxides and hydrides that can expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous.
- The Dark Crystal (Wikipedia)
The Dark Crystal is a 1982 dark fantasy film directed by Jim Henson and Frank Oz. It stars the voices of Stephen Garlick, Lisa Maxwell, Billie Whitelaw, Percy Edwards, and Barry Dennen. The film was produced by ITC Entertainment and The Jim Henson Company and distributed by Universal Pictures. The plot revolves around Jen and Kira, two Gelflings on a quest to restore balance to the world of Thra and overthrow the evil, ruling Skeksis by restoring a powerful broken Crystal.