All articles tagged with #biosignatures
Scientists found bacteria and archaea two meters underground in Chile’s Atacama Desert, detected with the SOLID biosignature detector, revealing a hidden, salt‑rich microbial oasis that could inform how and where life might exist beneath Mars’ surface.
Astrobiologists propose Assembly Theory as an Earth-agnostic metric for detecting life on exoplanets, evaluating how hard molecules are to assemble rather than simply listing atmospheric species. A high assembly index and interconnected chemistry would signal life, avoiding many Earth-centric false positives. Comparing Earth, Venus, and Mars shows Earth as the most chemically diverse, and the method would yield a continuous life-likelihood score obtainable from infrared spectra, compatible with NASA’s Habitable Worlds Observatory.
NASA’s Curiosity rover detected organic compounds in a Martian rock sample, raising the possibility that past life could have contributed to these molecules. A Feb. 2026 Astrobiology study argues non-biological processes can’t fully explain the abundance of organics, keeping the door open for life’s past on Mars but stopping short of definitive proof and calling for further study.
NASA's Perseverance rover detected mineral patterns in Martian rocks that resemble those formed by microbial life on Earth, suggesting possible past habitability, but further verification is needed to confirm any signs of life.
2025 was a landmark year in astronomy with discoveries including the interstellar comet 3I/ATLAS, evidence of supermassive black hole formation, weakening dark energy, potential signs of past life on Mars and exoplanets, and the first light of the Vera C. Rubin Observatory, promising a new era of cosmic exploration.
Scientists discovered signs of microbial life in a highly alkaline, blue volcanic goo beneath the Pacific Ocean near the Mariana Trench, providing insights into extreme habitats and potential origins of life on Earth.
NASA's Perseverance rover found compelling mineral and organic signals in Martian rocks that could indicate past microbial life, but further testing on Earth is needed for confirmation.
A study suggests that if life ever existed on Mars, traces of it could be preserved in the planet's subsurface ice for up to 50 million years, making it a promising target for future missions to find ancient microbial biomolecules.
NASA's Perseverance rover found minerals vivianite and greigite in Martian soil, which are linked to microbial activity on Earth, sparking excitement as the closest evidence yet of potential life on Mars, though further testing is needed to confirm biological origins.
NASA's Perseverance rover found potential chemical signs of ancient microbial life in rocks from Jezero Crater's Bright Angel formation, including organic molecules and minerals associated with water and microbial activity, though further analysis is needed to confirm biological origins.
NASA's Perseverance rover found potential signs of ancient microbial life on Mars, but ongoing budget cuts and the possible cancellation of the Mars Sample Return mission threaten to undermine future scientific progress and exploration efforts, highlighting a divide between scientific discovery and human space exploration priorities.
NASA's Perseverance rover found mineral and organic signatures in Martian rocks that could be remnants of ancient microbial life, marking the closest evidence yet of potential past life on Mars, though further analysis is needed to confirm this.
NASA's Perseverance rover found a rock sample on Mars with features suggesting potential signs of ancient microbial life, bringing scientists closer to answering whether life ever existed on the planet. The sample, called Sapphire Canyon, contains minerals and textures that could be linked to microbial activity, though nonbiological explanations are also possible. Further analysis and sample return are planned to confirm these findings.
NASA's Perseverance rover found mineral signs in Martian rocks that could indicate past microbial life, suggesting Mars once had water and a habitable environment, though this is not definitive proof of life.
NASA's Perseverance rover in Jezero Crater has identified diverse mineral and organic features in the Bright Angel formation, including potential biosignatures like organic matter, Fe-phosphate nodules, and reaction fronts, suggesting past habitable conditions and possible biological activity on Mars.