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Oxytropidoceras posted a topic in Fossil NewsMegalodon may have been killed off by Supernova radiation, Hannah Osborne, Newsweek, December 13, 2018 https://www.newsweek.com/megalodon-extinct-shark-supernova-cosmic-ray-cancer-mutations-1256980 Massive supernova explosion may have wiped out giant prehistoric sharks, scientists say. Megalodon may have been among creatures driven to extinction after cosmic particles drove up cancer rates, new study claims The Independent, Josh Gabbatiss, December 2018 https://www.independent.co.uk/news/science/supernova-stars-explosion-giant-sharks-prehistoric-megalodon-extinction-science-a8679636.html The paper is: Adrian L. Melott, Franciole Marinho, and Laura Paulucci 2018, Hypothesis: Muon Radiation Dose and Marine Megafaunal Extinction at the End-Pliocene Supernova. Astrobiology, Published Online, November 27, 2018 https://doi.org/10.1089/ast.2018.1902 and at Muon Radiation Dose and Marine Megafaunal Extinction at the end-Pliocene Supernova Adrian L. Melott (Kansas), Franciole Marinho, Laura Paulucci (Submitted on 26 Dec 2017 (v1), last revised 17 Oct 2018 (this version, v2)) https://arxiv.org/pdf/1712.09367.pdf https://arxiv.org/abs/1712.09367 Yours, Paul H.
Near-Earth Supernova Explosions (When Stars Attack! ) In Search of Near-Earth Supernova Explosions Brian Fields, KU Physics & Astronomy Public Talks, Published on Apr 20, 2016 https://www.youtube.com/watch?v=ND6u4Rnq0g0 Related papers are: Breitschwerdt, D., Feige, J., Schulreich, M.M., de Avillez, M.A., Dettbarn, C. and Fuchs, B., 2016. The locations of recent supernovae near the Sun from modelling 60 Fe transport. Nature, 532(7597), p. 73-78. https://www.earth.northwestern.edu/people/seth/351/breitschwerdt.pdf https://www.nature.com/articles/nature17424 Fields, B.D. and Ellis, J., 1999. On deep-ocean 60Fe as a fossil of a near-earth supernova. New Astronomy, 4(6), pp. 419-430. https://arxiv.org/pdf/astro-ph/9811457.pdf https://www.sciencedirect.com/science/article/pii/S1384107699000342 Fry, B.J., Fields, B.D. and Ellis, J.R., 2015. Astrophysical shrapnel: Discriminating among near-earth stellar explosion sources of live radioactive isotopes. The Astrophysical Journal, 800(1), 17 pp. https://arxiv.org/pdf/1405.4310.pdf http://iopscience.iop.org/article/10.1088/0004-637X/800/1/71/meta Wallner, A., Feige, J., Kinoshita, N., Paul, M., Fifield, L.K., Golser, R., Honda, M., Linnemann, U., Matsuzaki, H., Merchel, S. and Rugel, G., 2016. Recent near- Earth supernovae probed by global deposition of interstellar radioactive 60 Fe. Nature, 532(7597), pp. 69-72. Yours, Paul H.