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    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 11 hours 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...

    • The Best Weekend Escapes from Chicago

      The New York Observer· 2 days ago

      While there’s plenty to do in Chicago, sometimes you need a weekend away from the hustle and bustle. Whether your idea of unwinding involves wine tasting, hopping onto a boat ...