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The supernova hypothesis

Image caption:
An existing hypothesis proposed that a supernova at the end of the Cretaceous had caused the extinction of dinosaurs. Supernovas throw off heavy elements like iridium so the hypothesis seemed to fit with the team's discovery of high iridium levels.

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If you use this image in your own non-commercial project please credit it to the University of California Museum of Paleontology's Understanding Science (http://www.understandingscience.org).


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