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       The first-ever discovery of an extraterrestrial radioactive isotope on Earth has scientists rethinking the origins of the elements on our planet. The tiny traces of plutonium-244 (Pu-244) were found in ocean crust alongside radioactive iron-60. The two isotopes are evidence of violent cosmic events in the vicinity of Earth millions of years ago. Star explosions, or supernovae create many of the heavy elements in the periodic table, including those vital for human life, such as iron, potassium and iodine. To form even heavier elements, such as gold, uranium and plutonium it was thought that a more violent event may be needed, such as two neutron stars merging.

New south walesAnton wallnerAvi shporerKavli institute for astrophysicsAustralian national universityPropulsion laboratoryTechnology organisationAustralian nuclear scienceTechnical university dresdenResearch scientistSpace researchHelmholtz zentrum dresden rossendorfProfessor wallnerDaily galaxyMassive supernova explosions near our solarIndian oceans