Changes in Earth's orbit have helped pace climatic change for millennia. Scientists are now trying to understand whether - and how - these changes remodeled the landscapes our ancient ancestors ...

which enact long-period changes on its orbital eccentricity, axial tilt, and precession. These changes, taking place over tens of thousands of years, are called Milankovitch cycles, and we have a ...

changes planetary eccentricity, a measure of how close to circular their orbits are," explains geophysicist Dietmar Müller of the University of Sydney. Milankovitch cycles were confirmed in 1976 ...