Curiosity Rover Detects Largest Organic Molecules on Mars

NASA's Curiosity rover has detected the largest organic molecules ever found on Mars, identifying long-chain alkanes—decane, undecane, and dodecane—in a 3.7-billion-year-old mudstone sample from Gale Crater. These hydrocarbons, which can be produced by both biological and non-biological processes, suggest that complex prebiotic chemistry may have occurred on ancient Mars.

The discovery was made using the Sample Analysis at Mars (SAM) instrument onboard Curiosity, which analyzed gases released from the Cumberland rock sample. The presence of these long-chain alkanes indicates that organic chemistry on Mars may have been more complex than previously thought.

While the origin of these molecules remains uncertain, their preservation over billions of years suggests that chemical traces from potential ancient Martian life could still be detectable today. Further analysis, including potential sample return missions, is needed to determine whether these compounds are indicative of past life or the result of abiotic processes.