Results 81 to 90 of about 8,850 (191)
On the Stability of Super-Earth Atmospheres
, 2012 We investigate the stability of super Earth atmospheres around M stars using a 7-parameter, analytical framework. We construct stability diagrams in the parameter space of exoplanetary radius versus semi-major axis and elucidate the regions in which the ...
Heng, Kevin, Kopparla, Pushkar
core +1 more source
Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley +1 more source
Neuromorphic Computing with Memcapacitors: Advancements, Challenges, and Future Directions
Advanced Electronic Materials, Volume 11, Issue 18, November 4, 2025.Neuromorphic computing reduces energy costs by integrating memory and processing in event‐driven architectures, achieving energy usage as low as 10–30 pJ per operation for memcapacitor‐based synapses. Memcapacitors are reviewed as strong contenders for neuromorphic computing, enhancing AI acceleration through charge‐based computations, high resistance,
Nada AbuHamra +4 more
wiley +1 more source
Overcast Mornings and Clear Evenings in Hot Jupiter Exoplanet Atmospheres
The Astrophysical Journal LettersAerosols are an old topic in the young field of exoplanet atmospheres. Understanding what they are, how they form, and where they go has long provided a fertile playground for theorists.
Guangwei Fu +12 more
doaj +1 more source
The Runaway Greenhouse Effect on Hycean Worlds
The Astrophysical Journal, 2023 Hycean worlds are a proposed subset of sub-Neptune exoplanets with substantial water inventories, liquid surface oceans, and extended hydrogen-dominated atmospheres favorable for habitability.
Hamish Innes +2 more
doaj +1 more source
, 2013 We calculated an atmospheric grid for hot mini-Neptune and giant exoplanets, that links astrophysical observable parameters- orbital distance and stellar type- with the chemical atmospheric species expected.
Kaltenegger, Lisa, Miguel, Yamila
core +1 more source
Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.Abstract We present observations of a rare configuration of Mercury's magnetosphere in response to sub‐Alfvénic upstream conditions, driven by an interplanetary coronal mass ejection (ICME) that impacted the planet on 1 May 2013. Using data from the Mercury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) spacecraft, supported by a ...
Charles F. Bowers +11 more
wiley +1 more source
New Phytologist, Volume 248, Issue 3, Page 1132-1153, November 2025.Summary One‐carbon (C1) metabolism, centered on the universal methyl donor S‐adenosyl methionine (SAM), plays critical roles in biosynthesis, redox regulation, and stress responses across plants and microbes. A recently proposed photosynthetic C1 pathway links SAM methyl groups directly to RuBisCO‐mediated CO2 assimilation and integrates with nitrogen ...
Kolby J. Jardine +6 more
wiley +1 more source
The Astrophysical JournalShort-period sub-Neptunes are common in extrasolar systems. These sub-Neptunes are generally thought to have primary atmospheres of protoplanetary-disk gas origin.
Issei Kobayashi +3 more
doaj +1 more source
The Origin of the Feedstock Molecules for Life on the Hadean Earth
Angewandte Chemie International Edition, Volume 64, Issue 42, October 13, 2025.The origin of life in the Hadean eon required the formation of amino acids and nucleosides among the key molecules of life. In an often postulated strongly reducing atmosphere, HCN and its derivatives are robustly formed as plausible starting molecules. But HCN does not form in a Hadean, weakly reducing atmosphere.
Nikolai Diukarev +6 more
wiley +1 more source