[astro-ph.IM]. NASA planetary protection policy seeks to avoid inadvertent forward contamination of celestial bodies and backward contamination of Earth during space exploration.
panspermia
Posted inPanspermia
Natural Lithopanspermia to Earth: Transport, Shielding, and Survival Limits for Solar-System and Extrasolar Donor Classes
[physics.gen-ph] Natural panspermia is a transport-and-establishment hypothesis, not a theory of abiogenesis. The Earth-specific question is whether any nonterrestrial donor remains competitive with terrestrial origin once launch, planetary-system escape, transit, […]
Posted inVenus
A Panspermia Origin For Venus Cloud Life
[USRA] Panspermia is the idea that life can originate on one planetary body and then be transferred to other bodies. Impacts are often the suggested method for transfer, as they […]
Posted inOrigin & Evolution of Life
The Biological Cosmological Constant ΛB: Exploratory Propensity, Dynamical Habitability And The Geometric Origin Of Life
[BioSystems via PubMed] The emergence of life represents a fundamental geometric phase transition in the state space of complex systems, rather than a mere sequence of chemical syntheses. Building upon […]
Posted inEuropa, Meteorites & Asteroids, Origin & Evolution of Life, Panspermia, Planetary Protection & Biosafety, Status Report, Water/Hycean Worlds & Oceanography
Earth As A Potential Source Of Llife For Europa’s Subsurface Ocean
The paper discusses the possibility of dust particles containing living bacteria ejected from Earth reaching Europa and landing on its surface.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Impact events, Origin & Evolution of Life, Panspermia, Press Release
Impact History Of Early Earth Created Conditions Conducive To Life
Southwest Research Institute scientists modeled the early impact history of Earth, seeking insight into potential origins of life. These models show that asteroid impacts on the early Earth plowed up […]
Posted inBiophysics, Extremeophiles and Extreme Environments, Genomics, Proteomics, Bioinformatics, Habitable Zones, Microbiology & Virology, Microgravity, Origin & Evolution of Life, Panspermia, Planetary Protection & Biosafety, Press Release, Radiation, Space Life Science
Radiation-Resistant Microbes: Pioneers for Life Beyond Earth
Radiation is one of the most pervasive environmental stressors that has profoundly influenced microbial evolution, driving the development of intricate survival strategies in extreme environments.
Posted inAstrogeology, Biosignatures & Paleobiology, Impact events, Mars, Meteorites & Asteroids, Panspermia, Status Report
Could Life Have Been Transferred From Mars To Earth? Laboratory And Computational Simulations Of Martian Ejecta
The study of the origin of life on Earth has been broadened due to panspermia models that suggest that early life may have been transferred between planets.
Posted inAtmospheres, Climate, Weather, Biophysics, Biosignatures & Paleobiology, Impact events, Meteorites & Asteroids, Panspermia, Status Report, Venus
A Panspermia Origin For Venus Cloud Life
Decades of study have hinted at the astrobiological potential of Venus’s cloud layers. This potential is often cast as stemming from the idea that the Venusian surface was clement in […]
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Gaia - Planetary Perspectives, Panspermia, Planetary Protection & Biosafety, Press Release, Terraforming & Geoengineering
Terraforming/Panspermia: A New Way To Detect Life Beyond Earth Without Knowing What Life Looks Like
A research team of Specially Appointed Associate Professor Harrison B. Smith of Earth-Life Science Institute (ELSI) at Institute of Science Tokyo and Specially Appointed Associate Professor Lana Sinapayen of National […]