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    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 3 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...

    • Attenborough's epic sign off

      Attenborough's epic sign off

      BBC News· 4 hours ago

      Watch David Attenborough's epic sign off as the acclaimed Planet Earth II came to its conclusion on Sunday night on BBC One.

    • Earth facing "global water crisis"

      Earth facing "global water crisis"

      Newsweek· 1 day ago

      The Earth is facing a global crisis, as water quantity and quality is projected to get worse, a new study has found. The study, published in Nature...