Results 81 to 90 of about 4,557 (205)
Seeding the Solar System with Life: Mars, Venus, Earth, Moon, Protoplanets
Open Astronomy, 2020 In the space of the entire universe, the only conclusive evidence of life, is found on Earth. Although the ultimate source of all life is unknown, many investigators believe Earth, Mars, and Venus may have been seeded with life when these planets, and ...
Joseph Rhawn G. +3 more
doaj +1 more source
Observational Evidence for Wind‐Driven Low‐Pass Filtering of Infrasound at Short Range
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract Infrasound from controlled explosions provides a unique opportunity to isolate atmospheric effects on propagation. We report observations from two campaigns in May and October 2024, each featuring 10‐ton TNT‐equivalent controlled surface chemical explosions recorded by a dense network of 31 single‐sensor stations within 23 km.
Elizabeth A. Silber +10 more
wiley +1 more source
Pressure as a Limiting Factor for Life
Life, 2016 Facts concerning the stability and functioning of key biomolecular components suggest that cellular life should no longer be viable above a few thousand atmospheres (200–300 MPa).
Rachael Hazael +3 more
doaj +1 more source
Shock induced vaporization of anhydrite CaSO4 and calcite CaCO3 [PDF]
, 2000 Discovery of abundant anhydrite (CaSO4) and gypsum (CaSO4.2H2O) in the otherwise carbonate sediments comprising the upper portion of the rocks contained within the Chicxulub impact crater has prompted research on the shock-induced vaporization of these ...
Ahrens, Thomas J. +2 more
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Late Frasnian mass extinction: Conodont event stratigraphy, global changes, and possible causes [PDF]
Several abrupt changes in conodont biofacies are documented to occur synchronously at six primary control sections across the Frasnian-Famennian boundary in Euramerica. These changes occurred within a time-span of only about 100,000 years near the end of
Butler, Jamie L. +3 more
core +1 more source
Ionospheric effects during first 2 hours after the Chelyabinsk meteorite impact [PDF]
, 2013 This paper presents the analysis of ionospheric effects in the region close to the Chelyabinsk meteorite explosion at 03:20UT 2013 February 15 from the Institute of Solar-Terrestrial Physics of Siberian Branch of Russian Academy of Sciences (ISTP SB RAS)
Berngardt, O. I. +4 more
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Discovery of a Meteor of Interstellar Origin
, 2019 The first interstellar object, `Oumuamua, was discovered in the Solar System by Pan-STARRS in 2017, allowing for a calibration of the abundance of interstellar objects of its size $\sim 100\;$ m.
Loeb, Abraham, Siraj, Amir
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Tellus: Series B, Chemical and Physical Meteorology, 2013 Nanometre CaO and pure carbon smoke particles were collected at 38-km altitude in the upper stratosphere in the Arctic during June 2008 using DUSTER (Dust in the Upper Stratosphere Tracking Experiment and Retrieval).
Marco Ferrari +4 more
doaj +1 more source
Environmental effects of large impacts on the earth; relation to extinction mechanisms [PDF]
Since Alvarez et al., discovered a worldwide approx. cm-thick layer of fine sediments laden with platinum group elements in approximately chondritic proportions exactly at the Cretaceous-Tertiary (C-T) boundary, and proposed bolide-impact as triggering ...
Ahrens, Thomas J. +2 more
core +1 more source
New insights into the evolutionary history of biological nitrogen fixation
Frontiers in Microbiology, 2013 Nitrogenase, which catalyzes the ATP-dependent reduction of dinitrogen (N2) to ammonia (NH3), accounts for roughly half of the bioavailable nitrogen supporting extant life.
Eric eBoyd, John W. Peters
doaj +1 more source