(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

(CNN) — For anyone who has ever wondered whether they could handle life on another planet, NASA is offering a chance to find out – well, sort of. The US space agency is looking to recruit four ...

(CNN) — It’s day 25. You wake up in your bunk pod in a snow-capped Martian landscape, far from civilization. Outside it’s -30 degrees Celsius (-22 degrees Fahrenheit). After meditating and eating a ...

(CNN) — Twin spacecraft are set to take off on an unprecedented, winding journey to Mars, where they will investigate why the barren red planet began to lose its atmosphere billions of years ago.

(CNN) — Mars may have once had an ocean so vast that it covered one-third of the planet before evaporating billions of years ago and leaving behind a telltale sign: a flat band of land, outlining the ...

Today on CNN10: We'll learn what's in a batch of never-before-seen documents released by the US federal government, detailing their investigations into UFOs and other aerial phenomena. Then, we'll ...