There seems to be too much of a radioactive element in rocks deep in the Pacific Ocean – how did it get there 10 million years ago?
Articles on Radioactive isotopes
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The lost radioactive source may never be found.
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.
Top contributors
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Honorary Lecturer, Nuclear Physics, Australian National University
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Senior Lecturer, School of Earth and Planetary Sciences, Curtin University
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Visting Research Associate, School of Earth and Planetary Sciences, Curtin University
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Professor of Geochronology, Curtin University
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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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Associate Professor, School of Earth and Planetary Sciences, Curtin University
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Reader, School of Chemical and Physical Sciences, Keele University
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Senior Lecturer in Nuclear Engineering, UNSW
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Research Fellow, Imperial College London