Common chemical elements are created in stars like our sun. But heavy elements, like iron, are thought to form in massive stars that explode and spew material — though it might be more complicated.

Plutonium is one of the most complex elements in the periodic table. First synthesized and isolated in 1940 by scientists at ...

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Hubble Space Telescope-Image of Supernova. — NASA/ESA (CC BY 3.0) Within ten million or so years ago, a sprinkle of plutonium 244 arrived on Earth. It got buried in the sea bed, then got dug up by a ...

Last year, scientists announced they'd found a rare type of plutonium at the bottom of the Pacific Ocean. This plutonium is believed to have come from an exploding star. NPR's Nell Greenfieldboyce ...