Some of the unusual rocks carry stories about water on Mars. One has hints of long-gone microbes. All tell of a dynamic, complex planet.

The molecules may be remnants of fatty acids, which form cell membranes in Earth’s organisms, though they might have formed ...

The NASA Curiosity rover has detected the largest organic molecules found to date on Mars, opening a window into the red ...

NASA's Curiosity rover made a compelling find on Mars ' irradiated surface.

NASA’s Curiosity Mars rover has detected the largest organic (carbon-containing) molecules ever found on the red planet. The ...

A stunning discovery on Mars has revealed the longest organic molecules ever found on the planet—carbon chains that could ...

The Perseverance rover has found some intriguing samples on the red planet. Here's what they might reveal about the origins ...

The efforts made by humans to learn as much as possible about Mars are numerous, and NASA has an indispensable ally on the ...

Two NASA rovers on Mars recently made two independent discoveries further indicating that ancient life may have once existed ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The NASA Curiosity ...