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    related to: sediment

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    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 5 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...

    • A waterfall lost and a river found

      A waterfall lost and a river found

      Newswise· 4 days ago

      Over the last four years, the river and its surrounding area within the Amazon basin have experienced a lava dam collapse, 500 million tons of sediment...