[meteorite-list] Supernova triggers for end-Devonian extinctions

[Paul]

Exploding stars may have caused mass extinction on Earth,
study shows, University of Illinois at Urbana-Champaign, August 18, 2020
https://www.sciencedaily.com/releases/2020/08/200818142104.htm

"Killer cosmic rays from nearby supernovae could be the
culprit behind at least one mass extinction event, researchers
said, and finding certain radioactive isotopes in Earth's
  rock record could confirm this scenario."

The open access paper is:

Brian D. Fields, Adrian L. Melott, John Ellis, Adrienne F.
Ertel, Brian J. Fry, Bruce S. Lieberman, Zhenghai Liu,
Jesse A. Miller, Brian C. Thomas. Supernova triggers for
end-Devonian extinctions. Proceedings of the National
Academy of Sciences, 2020; 202013774
https://www.pnas.org/content/early/2020/08/17/2013774117

Yours

Paul H.