NASA Confirms Evidence of Ancient Liquid Water on Mars Surface
Data from the Perseverance rover has provided the strongest evidence yet that liquid water once flowed across large regions of Mars, raising new questions about ancient life.
Cross-verified and synthesized across 2 independent reporting sources:
Mars surface panoramic view from NASA Perseverance rover
NASA scientists have announced what they describe as the strongest evidence to date that liquid water once existed on the Martian surface in large quantities, based on new mineralogical data from the Perseverance rover.
The Discovery
The rover's SHERLOC instrument detected the presence of carbonates, sulfates, and phyllosilicates in a rock formation at Jezero Crater that is consistent with formation in a warm, shallow lake environment approximately 3.5 billion years ago.
Why This Matters
The presence of liquid water is considered a prerequisite for life as we know it. If Mars once had stable bodies of liquid water, the planet may have been capable of supporting microbial life in its ancient past.
Mars Sample Return Implications
NASA plans to return samples from Jezero Crater as part of the Mars Sample Return mission, now targeted for 2031. Scientists are particularly eager to analyse the carbonate formations for any preserved biosignatures.
Remaining Questions
While the mineralogical evidence is compelling, scientists caution that liquid water alone does not confirm past life. Many other conditions — including the availability of energy sources and the right chemical gradients — are required for life to emerge.
