FARGO — Our planet Earth is tilted. That is to say, its axis of daily rotation is tilted about 23 and a half degrees from its axis of revolution around the sun. It is this tilt that gives us seasons.

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 ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

Earth's axis — the invisible line around which it spins — is bookended by the north and south poles. The axis tilts, and thus the pole shift, depending on how weight is distributed across Earth's ...