Forget what you learned in science class. The solar system is completely unhinged. We're talking oceans bigger than Earth's hiding under ice, rivers made of liquid methane, and moons orbiting entirely ...

We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known intelligent ...

How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

Add Yahoo as a preferred source to see more of our stories on Google. Yes, we've all been taught that the Earth is not flat, but it may shock you to learn that it's not perfectly spherical either. As ...