The remnants of a supernova, center bottom in blue-green, near the Small Magellanic Cloud, captured by the Hubble Space Telescope.
“Scientists studying a sample of oceanic crust retrieved from the Pacific seabed nearly a mile down have discovered traces of a rare isotope of plutonium, the deadly element that has been central to the atomic age. They say it was made in colliding stars and later rained down through Earth’s atmosphere as cosmic dust millions of years ago. Their analysis opens a new window on the cosmos. ... Dr. [Anton] Wallner works at the Australian National University as well as the Helmholtz Center in Dresden, Germany.Dr. Wallner and his colleagues reported their findings in Science on Thursday.Plutonium has a bad reputation, one that is well-deserved. ...”
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