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    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 7 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...

    • ‘Atlas’ Review: Jennifer Lopez Battles a Bot

      ‘Atlas’ Review: Jennifer Lopez Battles a Bot

      The Wall Street Journal· 17 hours ago

      If humanity is going to destroy itself eventually, why shouldn’t the superior beings pare the population down to a manageable number and let the homo...