Abundance of the chemical elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets of the Solar System have undergone an additional depletion of volatile hydrogen, helium, neon, nitrogen, and carbon (which volatilizes as methane). The crust, mantle, and core of the Earth show evidence of chemical segregation plus some sequestration by density. Lighter silicates of aluminum are found in the crust, with more magnesium silicate in the mantle, while metallic iron and nickel compose the core. The abundance of elements in specialized environments, such as atmospheres, or
Batman (Earth-Two) "Justice League of America" #82 and was created by Dennis O'Neil and Dick Dillin. The character history of the Earth-Two Batman accordingly adopts all of the earliest stories featuring the character from the 1930s and 1940s, while the adventures of the then-mainstream Silver Age Batman (who lived on "Earth-One") begin later in time and with certain elements of his origin retold. Each were depicted as separate, though parallel, individuals living in their respective universes, with the "older" Earth-Two character eventually reaching his retirement and death. A parallel to this character is introduced in "Justice Society of America Annual" #1 (2008)