Tag

Astrobiology

All articles tagged with #astrobiology

space2 days ago•10 min saved

Enceladus: sampling an alien ocean without landing via its plume

Enceladus, a small moon of Saturn, hides a global ocean beneath its ice and vents a plume of water vapor and ice grains through south-pole fractures, feeding Saturn’s E ring. Cassini flew through this plume from 2004–2017, sampling material from the ocean that had been altered en route and finding organic compounds and phosphorus, which points to habitability rather than life—no life-detection instruments were onboard. Future missions with dedicated biosignature instruments could probe further, but none are funded yet; current insights come from re-analysis of Cassini data and the plume’s status as a processed sample of an alien ocean.

via Space Daily|

#astrobiology #enceladus #plume

science18 days ago•4 min saved

Life's Flow: New Fine-Tuning Hypothesis Links Constants to Cellular Fluid Dynamics

A Queen Mary University of London team proposes that the Universe’s fundamental constants lie in a narrow range that keeps liquids—like water and blood—flowing in a way compatible with life. Even small changes could drastically alter viscosity and diffusion, potentially preventing cellular processes and life as we know it. Building on earlier work linking viscosity to physical limits, the study adds a biology-focused angle to the fine-tuning discussion, suggesting a possible second layer of tuning that governs whether life can emerge. While theoretical and speculative, follow-up work is exploring how cellular liquid motion could constrain constants and reflect deeper connections between physics and biology.

via ScienceDaily|

#astrobiology #bio-tuning #fundamental-constants

science19 days ago•5 min saved

Asteroid Ryugu Carries All Five DNA Bases, Suggesting Spaceborn Prebiotic Chemistry

Researchers analyzing asteroid Ryugu samples from JAXA’s Hayabusa2 mission found all five DNA/RNA nucleobases (adenine, guanine, cytosine, thymine, uracil), indicating these building blocks are widespread in the solar system. Published in Nature Astronomy (March 16, 2026), the finding suggests spaceborne prebiotic chemistry could have delivered life's ingredients to early Earth, but it does not prove extraterrestrial life.

via The Daily Galaxy|

#astrobiology #nucleobases #ryugu

science21 days ago•8 min saved

Mars Clay Preserves Diverse Organic Molecules, Hinting at Ancient Habitability

NASA's Curiosity rover, using the SAM instrument and a TMAH-based process, detected more than 20 organic molecules in the Glen Torridon clay-bearing unit of Gale Crater, including a nitrogen-containing compound similar to DNA components and benzothiophene. The findings suggest ancient organics could be preserved for about 3.5 billion years, signaling past habitability, but they do not prove life; confirming such a possibility would require returning Martian rocks to Earth. The study was published in Nature Communications.

via SciTechDaily|

#astrobiology #curiosity-rover #mars

science1 month ago•4 min saved

Ancient Mars likely hosted a vast ocean as Curiosity uncovers new organics

Scientists say Mars once hosted a giant ocean covering about a third of the planet, based on orbital mapping of a continental-shelf-like feature, while NASA's Curiosity rover found seven previously unseen organic molecules in a rock sample. The findings don’t prove past life, but they show Mars had the right chemistry for it and bolster the push to explore the planet further, including NASA’s plans for a future nuclear-powered mission.

via USA Today|

#ancient-ocean #astrobiology #curiosity-rover

science1 month ago•2 min saved

Curiosity Detects Complex Organics in 3.5-Billion-Year Martian Rocks

NASA’s Curiosity rover, using a novel TMAH-based wet chemistry, identified over 20 organic molecules in clay-rich rocks from Glen Torridon in Gale Crater, including compounds like naphthalene and benzothiophene. The discovery, among the most complex organics found on Mars, points to chemical precursors to more complex molecules and adds to evidence that ancient Mars could have been habitable.

via USA Today|

#astrobiology #curiosity #mars

science1 month ago•5 min saved

Some Fungi Could Weather the Martian Journey, NASA Study Finds

A NASA-backed study shows spores of Aspergillus calidoustus can survive simulated space travel and Martian conditions, highlighting microbial resilience that informs planetary protection and microbial risk assessments for future Mars missions—though it does not imply Mars contamination is likely.

via The Daily Galaxy|

#astrobiology #fungi #nasa

space1 month ago•2 min saved

Curiosity Uncovers 3.5-Billion-Year Organic Clues on Mars

Curiosity's analysis of Gale crater clay found 20+ organic molecules, including a nitrogen-bearing compound akin to DNA precursors and a benzothiophene, suggesting ancient organics were preserved on Mars for ~3.5 billion years and that the planet once offered habitable conditions; Earth-based experiments with a meteorite and landing simulations aided interpretation, while ESA plans a 2028 Rosalind Franklin rover to continue the search.

via Nautilus | Science|

#astrobiology #curiosity-rover #gale-crater

science1 month ago•5 min saved

Curiosity Finds Diverse Organic Molecules on Mars, Hinting at Ancient Habitability

NASA’s Curiosity rover, analyzing the Mary Anning 3 rock with the SAM lab, detected 21 carbon-containing molecules—the most diverse organic suite yet found on Mars, including seven not seen before and a nitrogen-containing heterocycle that could be a precursor to RNA/DNA; the findings, preserved in clay-rich rocks and complemented by tests on the Murchison meteorite, boost the case that ancient Mars had chemistry compatible with life, though it’s uncertain whether biology or geology produced the organics.

via NASA (.gov)|

#astrobiology #curiosity #mars

space1 month ago•2 min saved

Curiosity Finds Ancient Organic Clues on Mars, Still No Evidence of Life

NASA's Curiosity rover detected organic molecules in a dried lakebed in Gale Crater on Mars, including benzothiophene and a nitrogen-bearing compound reminiscent of DNA precursors. While these are building blocks for life and suggest preserved chemistry from about 3.5 billion years ago, the findings do not prove life existed there and could result from meteorite delivery or geological processes. The discovery keeps Mars as a prime candidate for past habitability and sets the stage for deeper analysis by the upcoming Rosalind Franklin rover (2028), with the results published in Nature Communications.

via The Guardian|

#astrobiology #curiosity-rover #mars

space1 month ago•4 min saved

Curiosity's bold chemistry test reveals more organic clues on ancient Mars

NASA's Curiosity rover carried out a novel TMAH-based chemistry experiment on Mars that detected more than 20 organic molecules, including benzothiophene, suggesting preserved organics on the planet's surface for over 3 billion years. While not proof of past life, the findings reinforce Mars' ancient habitability and guide future missions like Mars Sample Return and ESA's Rosalind Franklin rover.

via CBS News|

#astrobiology #curiosity #mars

science1 month ago•5 min saved

Moss Survives Nine Months in Space, Regrows on Earth

The moss Physcomitrium patens’ sporophyte was mounted on the ISS exterior for about 283–286 days, enduring vacuum, radiation and extreme temperatures. Returned via SpaceX Dragon in Jan 2023, ~86% of exposed spores germinated versus 97% of Earth controls, with a ~20% drop in chlorophyll a, but growth still occurred. The results suggest hardy pioneer organisms could help seed space ecosystems for Moon/Mars missions, potentially aiding oxygen production and soil formation; models even estimate survival up to about 5,600 days in similar conditions.

via The Daily Galaxy|

#astrobiology #iss #moss

science1 month ago•6 min saved

Tardigrades as Earth’s Enduring Survivors: Tiny Creatures, Big Implications

Oxford and Harvard researchers find tardigrades—the water bears—are the most likely animals to outlive Earth’s final catastrophe, thanks to cryptobiosis and refuges in deep oceans; true planetary sterilization would require boiling the oceans, a feat only achievable by an extraordinarily massive asteroid or rare stellar explosions, while microbes would likely survive and ecological collapse could still wipe out all life even if some tardigrades endure.

via Indian Defence Review|

#astrobiology #cryptobiosis #extinction

science1 month ago•5 min saved

Northern Martian Shelf Points to a Long-Lived Ocean

Researchers identify a continental-shelf-like feature in Mars’ northern hemisphere, a stable topographic region suggesting a long-lasting ocean in the planet’s past. Published in Nature, the study argues that this shelf—more durable than shorelines on Mars—could record evidence of water and potential habitability, guiding future rover missions to explore deposits.

via The Daily Galaxy|

#ancient-ocean #astrobiology #continental-shelf

science1 month ago•6 min saved

Mars Life Claims Spark Debate as Curiosity Images Are Analyzed for Insects and Reptiles

An Ohio University entomologist analyzes Curiosity rover images and claims to see winged insects and reptile-like fossils on Mars, suggesting a possible ecosystem. NASA’s published findings do not confirm macroscopic life, and many scientists attribute such observations to pareidolia; Curiosity has revealed ancient lakebeds and preserved organics, but no definitive life forms.

via Indian Defence Review|

#astrobiology #curiosity-rover #insectlike-life