Earth's inner core is solid, seismic waves reveal

It's amazing how we can learn things about the very depths of our planet.

3.2 Imaging Earth's Interior – Physical Geology, First University of Saskatchewan Edition

Earth's inner core is slowing down its spin. Should we be worried? - BBC Science Focus Magazine

What's Inside Earth's Inner Core? Seismic Waves Reveal an Innermost Core. - The New York Times

Antipodal seismic reflections upon shear wave velocity structures within Earth's inner core - ScienceDirect

Something very weird is happening inside Earth's core

News on ZME Science

Rotation of Earth's inner core could be lengthening days, study reveals

Inner Core of Earth Not A Normal Solid - Science news - Tasnim News Agency

Earth's inner core - Wikipedia

Earth's Interior CK-12 Foundation

Seimic Waves and Earth's Interior

Researchers peer into Earth's inner core: Data show solid metal sphere is 'textured

Scientists May Have Found Evidence of Earth's “Inner Inner” Core

Earth's inner core is solid, seismic waves reveal