There's no telling what will gain traction on social media, but one conspiracy theory has gained enough traction for NASA to make a statement.

The North American craton actually dips near the Rockies rather than forming a sharp vertical step as previously believed.

It's been more than 50 years since humans set foot on the Moon, but how much do you know about the lunar satellite?

The surface of our world has been in a constant state of flux for millions of years. Continents have wandered, oceans have ...