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    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 2 days ago

      In this case, a supernova within about 160 light-years, or 1.5 quadrillion kilometers, would qualify. Iron 60 is a radioactive isotope of iron that...

    • AP News Summary at 11:54 p.m. EDT

      The Herald Bulletin· 6 days ago

      The judge in Donald Trump’s hush money trial cleared the courtroom of reporters and then threatened to remove the ...