If you’ve ever played with tops, you know that some spin easily while others wobble. Ever wonder why? The answer has to do with rotational inertia, a property shared by all rotating systems. Sometimes ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A single rotation of our planet takes 24 hours and ...

A strange impact of the continuously warming climate is that colossal amounts of ice melting into the planet's oceans have played a prominent role in moving Earth's axis — the invisible line Earth ...

Sea-level changes offer an independent record of dramatic Jurassic and Cretaceous episodes when the solid Earth may have reoriented.