There's a lot more to Earth than meets the eye. Far from being just a roundish rock barreling through space, our planet is composed of several layers held together by intense forces of gravity. Our ...

How much do you remember about planet Earth in the news over the last 12 months? Take our quiz to find out! When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

But Earth isn't the only place we've set up shop. Space-based telescopes like Hubble, James Webb, and Chandra orbit far above ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Kinga Krzeminska/Getty Images The equator is the imaginary line that horizontally ...

Tonight is the launch of NBC's new interactive game show The Million Second Quiz, which, as its title suggest, takes places over the course of a continuous million seconds. That sounds challenging and ...

Earth Day began in 1970 and takes place on April 22 every year. Here are 10 questions to test your knowledge of the planet. 1. A day on Earth is 24 hours but it always hasn’t been that way. Are the ...

Millions of asteroids are floating around in space. Find out what you know about these relics of our solar system. (Jungmin Ryu for The Washington Post) Warning: This ...

Ötzi quiz: What do you know about the Iceman mummy who was murdered 5,300 years ago in the Alps? 'Beautifully preserved' ice age horse skull unearthed in Yukon mine Earth's early primates evolved in ...