The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

All the Latest Game Footage and Images from Planet Quiz: Learn & Discover – Trivia Do you enjoy finding out interesting, bizarre or quirky facts? Whether you want something easy or more challenging, ...

Lonely Planet has added to its iPortfolio with a new trivia app, allowing players to test their knowledge and solve puzzles about the world they inhabit. It was developed with BBC Worldwide's Digital ...

Look up at the night sky on a clear evening and you’ll see a few thousand stars. But what you’re actually glimpsing is a tiny, almost laughably small slice of a universe so vast, so ancient, and so ...