Proof of ancient life? Perseverance rover discovers Martian complex carbon signatures

- Proof of ancient life? Perseverance rover discovers Martian complex carbon signatures. NASA’s Perseverance rover has uncovered complex organic carbon in Martian rocks, giving scientists another clue in the search for evidence of ancient life on Mars. Researchers identified large carbon-bearing molecules inside two mudstone samples collected in Jezero Crater, an area believed to have hosted a lake billions of years ago. The findings rank among the strongest detections of organic material yet reported from the crater, a site NASA selected because it could preserve signs of past habitability. Scientists caution that the discovery does not prove life once existed on Mars. However, the presence of complex carbon compounds in ancient sediments strengthens the case for further investigation. Carbon-rich Martian rocks A research team led by Ashley Murphy of the Planetary Science Institute analyzed data from Perseverance’s SHERLOC instrument, which uses laser spectroscopy to identify chemicals and minerals in rocks. The instrument mapped organic material across the mudstones and revealed hundreds of carbon-rich signatures. According to the study, the detections represent the most robust evidence of organic material found in Jezero Crater so far. Speaking to Space.com, Murphy said scientists are particularly interested in macromolecular carbon because similar compounds on Earth often appear in extremely old rocks and can preserve traces of ancient microbial activity. She added that researchers expect to find comparable organic compounds in ancient Martian rocks if early Mars shared environmental conditions with early Earth. Detecting those compounds helps scientists determine whether the ingredients and conditions necessary for life ever existed beyond our planet. The team found the carbon-bearing material in mudstones located within Bright Angel, a rocky region connected to Neretva Vallis, an ancient river channel that once carried water into Jezero Crater. Link to earlier discovery