Countdowns

Earth is home to some truly alien-looking landscapes. From ice caves to martian-red deserts, discover some of the strangest places Earth has to offer.

From the mighty Saturn V to NASA's new Space Launch System, see how the biggest rockets on Earth compare.

NASA's incredible Saturn V rocket propelled dozens of humans toward Earth's moon. The rocket's first flight, for the Apollo 4 mission, took place 50 years ago, on Nov. 9, 1967.

Reference New exoplanet discoveries have changed what we understand about the universe and now astronomers are finding alien worlds all the time.

Take a tour of our solar system with us – from the sun to the furthest dwarf planets! Come on, it can't hurt!

Reference Explore our 25 weird solar system facts and see how our neighborhood is stranger than we could ever imagine.

Need your fix of mobile sci-fi action? These games will do the trick.

Reference Learn about the Big Bang theory and the evolution of the universe in ten steps.

Reference What are the greatest spaceships of science fiction? From the Millennium Falcon to Dr Who's Tardis, here's the rundown of our favorites.