Mars keeps refusing to behave like the dead, simple world many scientists once imagined. Each new rover trench, fractured boulder and orbital scan is turning up stranger chemistry, unexpected ...

The European Space Agency has released new images of a rare "butterfly" crater on the Red Planet. The bug-like structure ...

The surface of Mars looks like an empty red wasteland. But if you look a bit closer, the remnants of an ancient alien civilization begin to take shape. At least, that's the conclusion of George J.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Data from a retired ...

Of the more than 74,000 known meteorites – rocks that fall to Earth from asteroids or planets colliding together – only 385 or so stones came from the planet Mars. It’s not that hard for scientists to ...