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Unexplained mass extinctions on Earth In the study, the researchers provided no evidence that a supernova caused mass extinctions. Instead, the team hypothesized a stellar explosion may have been ...

Violent supernovas may have caused two of Earth’s largest mass extinctions that have never been completely explained, according to a theory put forward in new research.During the final stages of a ...

Violent supernovas may have caused two of Earth’s largest mass extinctions that have never been completely explained, according to a theory put forward in new research.During the final stages of ...