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) to the anti-matter universe and a single positive matter universe. Earth-Two "never existed" in this new universe's history, which retroactively removes the Earth-Two Batman from history, blending elements of his past with that of the Earth-One Batman's, effectively creating a Batman with a new modern continuity. During "Infinite Crisis", senior members of the Justice Society regain some memories of Earth-Two's previous existence. One year later, when the Gentleman Ghost attacks the JSA using powers of limited control over the spirits of the dead, Jakeem Thunder and the Thunderbolt are assisted in battle by the spirits of various deceased JSA members