NASA's Perseverance rover has encountered another rock on Mars that has left scientists puzzled.

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

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

NASA’s Curiosity rover has unearthed the largest organic molecules ever detected on Mars—possible fragments of fatty ...

Researchers caution that the molecules could be of abiotic or biological origin, and do not represent definitive proof of ...