AI Summary

The presence of iron-60 in Antarctic ice cores has been confirmed by an international research team, providing evidence that Earth is accumulating this radioactive isotope from the Local Interstellar Cloud. The researchers analyzed ice cores tens of thousands of years old and found a steady but time-varying influx of iron-60, a rare isotope produced in stellar explosions. This suggests that the isotope has been stored within the cloud since a long-past stellar explosion. The findings, published in Physical Review Letters, offer insight into the Earth's interaction with the surrounding interstellar environment.

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