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    • The Overseas Highway: The US' 'floating' highway

      BBC News· 4 minutes ago

      As many Americans hit the road this weekend to kick off the unofficial start of summer in the US, we're revisiting one of our favourite road trip stories about an engineering marvel stretching ...

    • 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...