VISUAL ARCHIVE / IMAGE STORY
The Uneven Base of the Mantle
Deep-Earth structure matters to rotation models; this arrangement is not a map.
The deepest rocky mantle may contain chemically distinct regions and electrically conductive material near the liquid core. AI-generated conceptual illustration; the shapes and thicknesses are not a map or measurement.
THE OBSERVATION
What we can actually see.
Seismic and geophysical studies show that Earth’s deep mantle is not perfectly uniform. The gravitational-coupling model depends in part on the distribution of mass near the core–mantle boundary. Its inferred torque does not provide a detailed photograph of every chemically distinct or electrically conductive region.
THE ILLUSTRATION
What the artwork imagines.
The colored patches and boundary thicknesses suggest complexity without locating real structures. The composition is a teaching image, not a tomographic reconstruction of a specific section through Earth.
FROM THE ILLUSTRATED ARTICLE
The story that inspired it.
The article ends where the visible planet meets an invisible arrangement of mass that may help govern the length of its days.
Read The Earth Has a Hidden Hand on the ClockCHECK THE RECORD
The image interprets the research below. Follow the original work for the measurements and limits behind the scene.
Zhang and Dumberry, gravitational torque and day lengthOTHER IMAGE STORIES
The Core’s Small Tug on the Clock
The Clock Hidden Inside Earth
The Mark Shared by Titan and Pluto