The galactic cycle of extinction

@article{Gillman2008TheGC,
  title={The galactic cycle of extinction},
  author={Michel Gillman and Hilary E. Erenler},
  journal={International Journal of Astrobiology},
  year={2008},
  volume={7},
  pages={17 - 26}
}
Abstract Global extinction and geological events have previously been linked with galactic events such as spiral arm crossings and galactic plane oscillation. The expectation that these are repeating predictable events has led to studies of periodicity in a wide set of biological, geological and climatic phenomena. Using data on carbon isotope excursions, large igneous provinces and impact craters, we identify three time zones of high geological activity which relate to the timings of the… 
Mapping the location of terrestrial impacts and extinctions onto the spiral arm structure of the Milky Way
Abstract High-density regions within the spiral arms are expected to have profound effects on passing stars. Understanding of the potential effects on the Earth and our Solar System is dependent on a
A New View of the Mass Extinctions and the Worldwide Floods
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In this study, the reasons for mass extinction in Jurassic were investigated. It was shown that galactic compression led to the activation of terrestrial nuclear reactors, which in turn led to the
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Long periodic geodynamic processes with durations between 150 and 600 Million years appear to be in phase with similar galactic cycles, caused by the path of the solar system through the spiral arms
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It is concluded that there is little evidence for intrinsic periodicities in biodiversity, impact cratering or climate on timescales of tens to hundreds of Myr, and the numerous assumptions and uncertainties involved in the interpretation of the geological data suggest that Galactic midplane and spiral arm crossings have little impact on biological or climate variation above background level.
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Ideas about the geomagnetic field’s influence on evolution and biodiversity are controversial. The quantitative distribution of datum levels of oceanic microplankton during the last 2.0 Ma shows a
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  • M. S. Barash
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  • 2012
925 Changes of various scales in biotic communities determined by environmental reorganizations provide grounds for defining geological periods. Transitions between geological periods are marked by
S1473550418000125jra 323..328
High-density regions within the spiral arms are expected to have profound effects on passing stars. Understanding of the potential effects on the Earth and our Solar System is dependent on a robust
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