[essopenarchive.org] Extraterrestrial material has often been evaluated as delivered cargo: amino acids, nucleobases, organics, brines, or biological vectors.
Earth
Posted inAtmospheres, Climate, Weather
Coupled Evolution Of Earth’s H2-rich Proto-atmosphere And Oxidized Magma Ocean
[astro-ph.EP] Giant impacts during Earth’s final accretion likely generated global magma oceans, where the disproportionation of Fe2+ at lower-mantle pressures and segregation of the resulting metallic iron into the core […]
Posted inMagnetic Fields, Electromagnetism, bioelectricity,
Earth’s Magnetic Field Flipped Rapidly Across A Mass Extinction About 261 Million Years Ago
[Science China Press] Earth’s magnetic field is generated by the convection of liquid iron in the outer core. It forms a protective shield that deflects most solar wind and galactic […]
Posted inAtmospheres, Climate, Weather
Simulations Of The Evolving Ozone Layer: Implications For The Early Earth, Exoplanets, And The Search For Life
[astro-ph.EP] Over 4 billion years, Earth’s atmosphere has been transformed from a composition devoid of molecular oxygen (O2) to one where O2 is now 21% of our modern atmosphere by […]
Posted inBiogeochemical Cycles & Geobiology
Material Cycling Across Earth’s Spheres And Triggers Of Cambrian Explosion: A Tectonic Perspective
[ELSP] A comprehensive model of the Cambrian explosion featuring “multi-factors coupling and multi-sphere driving”. Supercontinent breakup and mantle plume activity served as the initial trigger of environmental change in the […]
Posted inMars
Did Earth And Mars Have Different Origins?
[University of Copenhagen] Four and a half billion years ago, Earth and Mars were born in the rotating cloud of gas and dust that would eventually become our Solar System.
Posted inEuropa
Jupiter Icy Moons Explorer Astrobiology Droid Completes Earth Flyby
[ESA] The European Space Agency’s Jupiter Icy Moons Explorer (Juice) skimmed the very outer edge of Earth’s atmosphere on 28 September, using the gravity of our home planet to alter […]
Posted inWater/Hycean Worlds & Oceanography
How Ocean Chemistry On Earth Helped Life Keep Breathing
[UC Riverside] Scientists have helped solve a longstanding mystery about how Earth remained habitable after oxygen first accumulated in its atmosphere more than 2 billion years ago, providing evidence that […]
Posted inHabitable Zones
Calculating Potential Cumulative Carbon Fixed And Evolutionary Stage For Earthlike Planets In Our Solar Neighborhood
[International Journal of Astrobiology] We propose a novel method for estimating possible biological evolutionary stage on exoplanets based on the hypothesis that biological evolutionary state is a linear function of […]
Posted inExoplanets, -moons, -comets
What The Solar System Can Teach Us About Rocky Exoplanets
[astro-ph.EP] The number of rocky extrasolar planets being discovered continues to increase, but so too does the apparent diversity of such worlds.