But organics can be produced by geological processes as well as biological ones.
"As planetary scientists and astrobiologists, we are very careful with laying out claims — claiming that life is the source of organics or possible biosignatures is a last-resort hypothesis, meaning we would need to rule out any non-biological source of origin," Sharma said.. In February 2021, the rover landed within Jezero Crater, the site of an ancient lake basin that prior work suggested displayed high potential for past habitability.
Specifically, the scientists examined data from the Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals instrument onboard Perseverance. SHERLOC is the first tool on Mars capable of conducting fine-scale mapping and analysis of organic molecules. The researchers focused on SHERLOC data from Máaz and Séítah, two rock formations on the Jezero Crater floor. When ultraviolet light from SHERLOC illuminates organic compounds, they can glow much like material beneath a blacklight. The fingerprint of wavelengths in the glow from a molecule can help identify it.in all 10 targets that Perseverance drilled into at Máaz and Séítah, covering a span of time from at least about 2.3 billion to 2.6 billion years ago.
This annotated image shows a rock target called"Garde," as analyzed by the Mars rover Perseverance's SHERLOC instrument. This data was taken on Sept. 18, 2021, the 207th Martian day, or sol, of the mission.
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