[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 […]
Earth
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.
Posted inWater/Hycean Worlds & Oceanography
Iron Helped Scientists Trace Earth’s Oxygen. Now It’s Telling A Bigger Story
[Michigan State University] For decades, scientists have studied iron preserved in ancient rocks to reconstruct how Earth’s oceans and atmosphere became rich in oxygen. A new study suggests iron has […]
Posted inGaia - Planetary Perspectives
Global Carbon Fixation In Earth’s Subsurface Biosphere
[biorxiv.org] The subsurface of our planet hosts 15% of Earth’s biomass and plays a key role in mediating the exchange of volatiles and elements between deep, long-residence-time geological reservoirs and […]
![The PM showing the mounted SHAPE instrument (left) along with the zoomed in view (right). Three major sub-systems are also marked. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Shaping-SHAPE.png?resize=1200%2C714&ssl=1)
Posted inExoplanets, -moons, -comets
Shaping SHAPE – A Spectro-polarimeter Onboard Chandrayaan-3 To Observe Earth As An Exoplanet
[astro-ph.IM] Spectro-polarimetry of HAbitable Planet Earth (SHAPE) is an experimental instrument onboard the Propulsion Module (Orbiter) of the Chandrayaan-3 mission, designed to perform disc-integrated spectro-polarimetric observations of Earth from lunar […]