"Exploding stars may have caused mass extinction on" Topic
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Tango01   | 16 Sep 2020 12:02 p.m. PST |
…Earth, study shows.
"A new study led by University of Illinois, Urbana-Champaign astronomy and physics professor Brian Fields explores the possibility that astronomical events were responsible for an extinction event 359 million years ago, at the boundary between the Devonian and Carboniferous periods.
The paper is published in the Proceedings of the National Academy of Sciences. The team concentrated on the Devonian-Carboniferous boundary because those rocks contain hundreds of thousands of generations of plant spores that appear to be sunburnt by ultraviolet light -- evidence of a long-lasting ozone-depletion event…"
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makes an addition to his Flash Gordon collection.