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The heavy elements

An atom of a radioactive element. Image: depositphotos.com

Discovery of radioactive plutonium from cosmic dust deposited on Earth confirms theories of the formation of the elements

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Traces of the radioactive plutonium were found in a deep-sea mineral in the Pacific Ocean, which is a millions-year-old archive of material from the Earth but also of cosmic dust that settles on it
A collapsing star's supernova. (collapsar) (NASA Goddard Space Flight Center)

Is a supernova the source of heavy metals on Earth?

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