Results 41 to 50 of about 1,490 (202)

Mass Estinctions Caused by Large Bolide Impacts [PDF]

, 1987
In this talk, I will describe the wealth of evidence that has forced my colleagues and me to conclude that the great mass extinctions, 65 million years ago, were caused by a large bolide impact on the earth.
Lavarez, Luis W.
core  

On the airburst of large meteoroids in the Earth's atmosphere. The Lugo bolide: reanalysis of a case study

, 2015
<p>Seismic data of the Lugo bolide of January 19, 1993.<br />  </p ...
Foschini, Luigi (5113958), Foschini, Luigi   +1 more
core   +1 more source

Plant ecological strategies shift across the Cretaceous-Paleogene boundary.

PLoS Biology, 2014
The Chicxulub bolide impact caused the end-Cretaceous mass extinction of plants, but the associated selectivity and ecological effects are poorly known. Using a unique set of North Dakota leaf fossil assemblages spanning 2.2 Myr across the event, we show
Benjamin Blonder, Dana L Royer, Kirk R Johnson, Ian Miller, Brian J Enquist   +4 more
doaj   +1 more source

Multiparameter Constraints on Empirical Infrasound Period-Yield Relations for Bolides and Implications for Planetary Defense

The Astronomical Journal
How effective are methods for estimating bolide energies from infrasound signal period-yield relationships? A single global period–energy relation can obscure significant variability introduced by parameters such as the atmospheric Doppler wind profile ...
Elizabeth A. Silber, Josep M. Trigo-Rodríguez, Iyare Oseghae, Eloy Peña-Asensio, Mark Boslough, Rodney Whitaker, Christoph Pilger, Philip Lubin, Vedant Sawal, Claus Hetzer, Randy Longenbaugh, Peter Jenniskens, Brin Bailey, Esther Mas Sanz, Patrick Hupe, Alexander N. Cohen, Thom R. Edwards, Sasha Egan, Reynold E. Silber, Summer C. Czarnowski, Miro Ronac Giannone   +20 more
doaj   +1 more source

New Signatures of Bio-Molecular Complexity in the Hypervelocity Impact Ejecta of Icy Moon Analogues

Life, 2022
Impact delivery of prebiotic compounds to the early Earth from an impacting comet is considered to be one of the possible ways by which prebiotic molecules arrived on the Earth.
Surendra V. Singh, Haritha Dilip, Jaya K. Meka, Vijay Thiruvenkatam, Vishakantaiah Jayaram, Mariyappan Muruganantham, Vijayan Sivaprahasam, Balabhadrapatruni N. Rajasekhar, Anil Bhardwaj, Nigel J. Mason, Mark J. Burchell, Bhalamurugan Sivaraman   +11 more
doaj   +1 more source

Science Needs for a Terrestrial Biosphere Tipping Point Early Warning System

Reviews of Geophysics, Volume 64, Issue 4, December 2026.
Abstract Tipping points in the Earth system have the potential to cause major detrimental impacts to the biosphere and societies. Their inherent nonlinearity implies that even relatively small additional increases in external forcing might result in disproportionately large adjustments to components of the Earth system.
Jesse F. Abrams, Chris Huntingford, Sergei Petrovskii, Joshua E. Buxton, Helen Millman, Chris A. Boulton, Robert J. Parker, Cristina Ruiz Villena, Andrew M. Cunliffe, Joseph Clarke, Valerio Lucarini, Darren Ghent, Peter M. Cox, Timothy M. Lenton   +13 more
wiley   +1 more source

«CHURYUMOV UNIFIED NETWORK»: NEW, IMPORTANT TASKS FOR ASTRONOMICAL OBSERVATORIES TO PROTECT SOCIETY IN THE ERA OF MODERN HYBRID WARS

Odessa Astronomical Publications, 2016
Authors created and provided the operation of the first version of the "Bolide Network of Churyumov" for continuous recording of twilight and daytime traces of aerial and aerospace intrusions overKievandKievdistrict during 2013-2016.
K. I. Churyumov, A. P. Vidmachenko, A. F. Steklov, N. G. Dashkiev, Ya. O. Romanyuk, I. V. Stepakhno   +5 more
doaj   +1 more source

LOWER PALEOCENE DEEP-WATER AGGLUTINATED FORAMINIFERA FROM THE CONTESSA HIGHWAY SECTION (UMBRIA-MARCHE BASIN, ITALY): TAXONOMY, STRATIGRAPHIC DISTRIBUTION AND ASSEMBLAGE TURNOVER ACROSS THE CRETACEOUS/PALEOGENE BOUNDARY

Rivista Italiana di Paleontologia e Stratigrafia, 2022
Deep-water agglutinated foraminifera (DWAF) are investigated from the lower Paleocene of the Contessa Highway Paleocene (CHP) section in the Umbria-Marche Basin in Italy.
SYOUMA HIKMAHTIAR, Mike Kaminski, CLAUDIA G. CETEAN   +2 more
doaj   +1 more source

DreamFold: A World Model to efficiently generate protein folding pathways in the latent space

Protein Science, Volume 35, Issue 11, November 2026.
Abstract While there is an abundance of static data for the structure of biological macromolecules, the data regarding their folding mechanisms and dynamics is scarce, posing a challenge to the training of AI models. The World Model approach, which has been very successful in robotics, can come in handy in this regard. From limited data, it can build a
Alan Ianeselli, Jewon Im, Eddie Cavallin, Mark B. Gerstein   +3 more
wiley   +1 more source

Discovery of the Baijifeng impact structure in Tonghua, Jilin, China

Matter and Radiation at Extremes, 2023
An impact structure 1400 m in diameter, formed by a bolide impact, has been discovered on Baijifeng Mountain in Tonghua City in Northeast China’s Jilin province. The impact structure takes the form of a cirque-shaped depression on the top of the mountain
Ming Chen, Yang Lu, Jiahao Ning, Wenge Yang, Jinfu Shu, Ho-kwang Mao   +5 more
doaj   +1 more source