The Earth may have been originally flatter ... for a long time but never before had we thought to check the shape of the planets as they form in the simulations. “We had always assumed that ...

also distort its shape slightly. They cause small variations in the strength of Earth's gravitational field — the force that pulls all objects on Earth downward, toward the planet's center.

WASHINGTON, D.C. — Earth’s inner core, a solid metal ball gyrating within the molten outer core, may be both slowing down and changing shape ... opposite side of the planet from instrument ...

Earth’s inner core, a solid metal ball gyrating within the molten outer core, may be both slowing down and changing shape. Recent analyses of earthquake waves have suggested that around 15 years ago, ...