Online Listing News: * Perseverance rover finds even more signs of extinct life on Mars  The Register
* Nasa rover detects potential signatures of ancient microbial life on Mars  The Guardian
* Possible signs of ancient life on Mars are rich in complex carbon  New Scientist
* Mars life search gets boost as rover test distinguishes mirrored biosignature molecules  Phys.org
* A Mars rover found organic carbon just sitting on a rock  Science News
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