While Earth's core consists mostly of iron, its density implies that lighter elements are also mixed in. Because hydrogen is abundant in the universe and can mix with iron under certain conditions, ...

Earth’s core has often been described as just a giant ball of iron and nickel. Now, a new study argues that it is also a major storage place for hydrogen, possibly equivalent to dozens of oceans’ ...

Tiny changes in Earth’s rotation may reveal a tug-of-war between its deformable inner core, liquid outer core and deep mantle.

Add Yahoo as a preferred source to see more of our stories on Google. If true, it could negate the need for some theories about the origins of water on Earth and, by extension, explain how Earth had ...

Earth’s molten iron core unexpectedly reversed direction beneath the Pacific, revealing a dramatic change in the hidden engine that creates our planet’s magnetic field. Satellite data suggest the ...

Add Yahoo as a preferred source to see more of our stories on Google. Photo Credit: iStock A day is supposed to last 24 hours, but Earth does not keep time quite that neatly. A new study found that ...

A battle of forces, driven by the motion of Earth’s core, can explain small variations in the planet’s rotation, study finds. The planet’s rate of rotation changes subtly over time, giving rise to ...

Variations in day length that occur on multidecadal timescales are caused by gravitational coupling between Earth’s inner core and its solid mantle. Read the paper: Gravitational torque drives ...