Scientists edge closer to answering Mars’ biggest question: Did life ever exist on the red planet? Here's the latest from two new finds.

Swipe Down for Full Video Story You have just completed a seven month journey through deep space. Earth has faded into a ...

The organic molecules discovered by NASA’s Curiosity rover could have been formed by life, but they could have also come from geologic processes or meteorites ...

"This experiment's never been run before on another world," said Amy Williams, an astrobiologist working on the Curiosity mission.

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.

NASA's Curiosity rover uncovered critical new samples, including a series of compounds planetary scientists consider building blocks for the origin of life on Earth ...

Mars is by far the most Earth-like planet in the solar system… but that's not saying much. We know that Mars once hosted oceans, rivers, lakes, streams. It had a thick, carbon-dioxide-rich atmosphere.

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