AI Summary

Scientists have confirmed that Earth is accumulating the radioactive isotope iron‑60 while the solar system travels through the Local Interstellar Cloud. An international team led by the Helmholtz‑Zentrum Dresden‑Rossendorf analyzed Antarctic ice cores tens of thousands of years old and detected a steady, time‑varying influx of the isotope. The researchers conclude that the iron‑60 has been stored in the cloud since a distant stellar explosion. The findings appear in Physical Review Letters. The study shows that, unlike the past supernova hits, the current supply comes from the interstellar medium rather than nearby explosions.

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