NASA spotted a circle of clouds over the Pacific Ocean, and the image is still breathtaking over 10 years later.

A 2014 satellite image captured a rare glimpse of a massive, eerily circular ring of clouds that formed slap-bang in the ...

SpaceX launched the private Fram2 mission Monday (March 31), sending a crew of four spaceflight rookies into an orbit never ...

A look at the evidence for the Earth being round or spherical. Aristotle’s reasoning is explained. The evidence includes a ship’s hull disappearing first over the horizon, the stars ...

A look at the evidence for the Earth being round or spherical. Aristotle’s reasoning is explained. The evidence includes a ship’s hull disappearing first over the horizon, the stars ...