The lost radioactive source may never be found.
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With Russian troops rolling through the Chernobyl exclusion zone in Ukraine, a biologist who studies wildlife in the area describes the risks of disturbing this radioactive landscape.
Traces of radioactive iron from the ocean floor, Antartica and the Moon reveal several waves of dust from distant stars over the past 10 million years.
The element was discovered in the fallout of a thermonuclear blast.
The Yarrabubba asteroid landed 2.2 billion years ago. Around the same time, the icy Earth went through a big thaw.
Alongside their famous dangers, radioactive materials have many beneficial uses. With as many more predicted as have already been discovered, nuclear physicists are searching for more isotopes.
Kontributor teratas
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Professor of Biological Sciences, University of South Carolina
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Professor of Nuclear Physics, Michigan State University
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Senior Lecturer in Nuclear Engineering, UNSW Sydney
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Associate Professor, Curtin University
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Senior research fellow, Curtin University
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Professor of Geochronology, Curtin University
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Research Fellow, Imperial College London
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Visting Research Associate, Curtin University
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Reader, School of Chemical and Physical Sciences, Keele University
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Dual PhD Candidate, Australian National University
