Results 51 to 60 of about 42,398 (325)
Clumpy Cold Dark Matter and Biological Extinctions [PDF]
Phys.Lett. B368 (1996) 266-269, 1995 Cosmological models with cosmic string and texture seeded universes predict a present abundance of very dense clumps of Cold Dark Matter particles. Their crossing through the solar system would induce a non-negligible amount of radiation damage to all living tissue; the severity of such an episode is assessed. The estimated frequency of these crossings
arxiv +1 more source
Applications of chemical imaging techniques in paleontology
National Science Review, 2018 Chemical imaging techniques, based on a combination of microscopy and spectroscopy, are designed to analyse the composition and spatial distribution of heterogeneous chemical complexes within a sample.
Yan-Hong Pan, Liangjun Hu, Tao Zhao
semanticscholar +1 more source
Proceedings of the National Academy of Sciences of the United States of America, 2016 Significance Experimental research on mice has yielded tremendous biological insight. However, the ∼140 million y of evolution that separate mice from humans pose a hurdle to direct application of this knowledge to humans.
L. Hlusko +4 more
semanticscholar +1 more source
Terr@ Plural, 2021 In the State University of Ponta Grossa is a reference institution in Paleontology in the State of Paraná, for being located on top of fossiliferous terrains of the Devonian and, mainly, by the tradition in research in this area since 1969.
Antonio Liccardo +4 more
doaj +1 more source
Paleontology in the 21st Century
Biology, 2023 For much of its 300+ year history, “modern” paleontology has been a descriptive science, firmly housed within geological sciences [...]
Mary H. Schweitzer
doaj +1 more source
Assessing the influence of the solar orbit on terrestrial biodiversity [PDF]
Astrophys.J. 768 (2013) 152, 2013 The terrestrial fossil record shows a significant variation in the extinction and origination rates of species during the past half billion years. Numerous studies have claimed an association between this variation and the motion of the Sun around the Galaxy, invoking the modulation of cosmic rays, gamma rays and comet impact frequency as a cause of ...
arxiv +1 more source
The Unfinished Synthesis?: Paleontology and Evolutionary Biology in the 20th Century
Journal of the History of Biology, 2018 In the received view of the history of the Modern Evolutionary Synthesis, paleontology was given a prominent role in evolutionary biology thanks to the significant influence of paleontologist George Gaylord Simpson on both the institutional and ...
David Sepkoski
semanticscholar +1 more source
Luminescence, Volume 37, Issue 12, Page 2129-2138, December 2022., 2022 Bacterial mineralization treatments can be effective, nontoxic, environmentally friendly, and chemically compatible with fossil heritage. However, accurate monitoring should be carried out to detect bacteria viability during and after treatments. Adenosine triphosphate (ATP) assay is proposed as a fast, affordable, portable, and easy‐to‐use system for ...
Silvia Marín‐Ortega +2 more
wiley +1 more source
Utilização de Veículos Alternativos de Comunicação para a Difusão do Conhecimento Paleontológico. [PDF]
Anuário do Instituto de Geociências, 2007 Paleontology teaching must be an usual subject in the cultural formation. It is from it that man understands the history ofEarth and its evolutionary process, giving a new look and perspective of what behaviors a society must adopt.
Ana Carolina Gelmini de Faria +5 more
doaj
Ciência & Educação, 2005 A Paleontologia é recomendada pelos PCN como tema de ciências para o ensino básico brasileiro, sendo freqüente em muitos livros didáticos no País.
Fernanda Torello de Mello +2 more
doaj +1 more source