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from BBC News

Earth's core far hotter than thought

Researchers revisit measurements to determine the temperature of the Earth's core, finding it to be 6,000C - as hot as the surface of the Sun.

The temperature 3,000 kilometres below the surface of the Earth is much more varied than previously thought, scientists have found.

Although we crust-dwellers walk on nice cool ground, underneath our feet the Earth is a pretty hot place. Enough heat emanates from the planet's interior to make 200 cups of piping hot coffee per hour for each of Earth's 6.2 billion inhabitants, says Chris Marone, Penn State professor of geosciences. At the very center, it is believed temperatures exceed 11,000 degrees Fahrenheit, hotter than the surface of the sun.

from University of Michigan News

Most of Earth's carbon may be hidden in the planet's inner core, new model suggests

Earth's inner core may be the planet's largest carbon reservoir, a new University of Michigan-led study suggests. Image credit: JPL/NASA