Not only is Earth's inner core spinning and growing, but it's also changing shape, according to new research. Our planet's inner core is a hot, solid ball of iron that is roughly 1,500 miles wide.

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like a spinning person pulling their arms in. Movement within the Earth’s molten core that shifts mass on the planet. Ocean circulation and pressure on the seabed that pulls on the Earth’s axis.

When set spinning, the setup mimics the roiling liquid iron in the Earth’s outer core, which forms electrical currents that generate the magnetic field in a process called a dynamo. His team ...

Mega-buildings and dams like China’s Three Gorges Dam are subtly shifting Earth’s rotation. With its 40 billion cubic meters of water, the dam affects our planet’s spin, adding 0.06 ...

CAPE CANAVERAL, Fla. (AP) — The asteroid that once had a small chance of striking Earth and now might slam into the moon resembles a spinning hockey puck, scientists said Tuesday. A team of ...

Specifically, the team used MESSENGER observations to probe Mercury ' s spin and gravity ... kilometres wide (about the same size as Earth ' s solid core which is about 2400 kilometres wide).