Earth’s spin is not as steady as it looks. As ice melts and groundwater is pumped from deep aquifers to the surface, the planet’s mass is shifting, and with it the position of the rotational axis that ...

This article was originally featured on The Conversation. Spring, summer, fall and winter–the seasons on Earth change every few months, around the same time every year. It’s easy to take this cycle ...

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 ...

Any planet, in our own solar system or beyond, is shaped by a certain set of influences: the whirlwind circumstances of its formation, the contents of its deep interiors, other natural phenomena that ...

A typical desk globe is designed to be a geometric sphere and to rotate smoothly when you spin it. Our actual planet is far less perfect — in both shape and in rotation. Earth is not a perfect sphere.