Earth’s spin is not as steady as it looks from the ground. As ice sheets melt and aquifers are drained, scientists now say the planet’s axis has shifted by more than 30 inches, a subtle but measurable ...

Millimeter deviations from the expected wobble of the Earth's axis are giving geophysicists clues to what happens 1,800 miles underground, at the boundary between the Earth's mantle and its iron core.

Scientists in Germany have used a highly sensitive underground ring laser to track Earth’s axial wobble without relying on telescopes, satellites, or external reference signals. The researchers from ...

The Earth had its shortest ever day on June 29, 2022, a scientist said. That day, a Wednesday, was 1.59 milliseconds shorter than ever before. It happened because the Earth isn't perfectly spherical ...