Learn how we know the Earth is round, and the science behind the shape of our gravitational field.

From a world shaped like a giant donut to a planet with the sharp edges of a perfect cube, changing the shape of Earth would dramatically alter how we live, move, breathe, and survive. While most of ...

Imagining every drop of Earth’s water hurled into the Sun sounds like a last-ditch cosmic fire extinguisher, but the physics ...