Unlike any other asteroid known today, Vesta has an iron core surrounded by layers of mantle rock and crust, similar to Earth and Mars, preliminary gravity and density measurements suggest.

WSJ: Asteroid Vesta Gets a Close Study

The origin of this effect may lie at the boundary between the mantle, made up of viscous rock that extends 2, 900 km (1, 800 miles) below the crust, and the outer core, which is thought to be liquid iron with the consistency of water.

BBC: Earth's wobbles reveal deep secrets

Meanwhile in the UK, the punk movement took on the mantle of political protest from its folk and rock forebears, with groups such as The Clash criticizing racial disharmony in British society.

CNN: The Spirit of Music: Is the protest over?

The rock is peridotite, which is one of the main rocks in the upper mantle, an area that provides a girth below the Earth's crust.

ECONOMIST: Greenhouse gases