core

The inner core began to decrease its speed around 2010, moving slower than the Earth’s surface. (USC Graphic/Edward Sotelo)

Earth’s Inner Core Slowing Down, New Study Reveals

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USC scientists have proven that the Earth’s inner core is backtracking — slowing down — in relation to the planet’s surface, as shown in new research published Wednesday in Nature.

Image shows artists impression of Mars core. Analysis of Martian seismic data recorded by the InSight mission have revealed that Mars’s liquid iron core is surrounded by a150-​km thick molten silicate layer, as a consequence of which its core is smaller and denser than previously proposed. (Artwork: Thibaut Roger, NCCR Planet S / ETH Zürich)

Mars’ liquid iron core is smaller and denser than previously thought, study

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Mars’ liquid iron core is smaller and denser than previously thought, according to a new study analysing InSight lander's data.

The geology of Earth's Southern Hemisphere has bee mapped in extremely high-resolution by scientists. It reveals a previously undiscovered ancient ocean floor 2,900 km (1,800 miles) below the surface that may wrap around the core. Seismic waves from earthquakes in the southern hemisphere were used to sample the structure along the Earth's core-mantle boundary. Image: Edward Garnero and Mingming Li/Arizona State University

An ancient ocean floor is wrapped around the Earth’s core

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The geology of Earth’s Southern Hemisphere has bee mapped in extremely high-resolution by scientists. It reveals a previously undiscovered ancient ocean floor 2,900 km (1,800 miles) below the su...