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
The Core through the crust underwater, leaving them safe on the ocean floor, but power and communications are offline. They believe themselves lost underwater but use the remaining power to activate a weak sonar beacon. The beacon attracts a nearby whale pod, and Finch is able to trace their whale songs to locate the "Virgil". A week after the mission, Finch unleashes the full details of the mission (including those lost) and of DESTINI to the public via the Internet. "The Core" had out-to-sea scenes, starring , with full support of the US Navy. The film garnered mixed reviews. The film received