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Ancient Rocks Reveal Earth's Proto-Composition and Catastrophic Collision

10/28/2025

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Summary

Story summary

Scientists find traces of proto-Earth in ancient rocks from Greenland, Canada, and Hawaii, dating to about 4.5 billion years ago.
The Massachusetts Institute of Technology study in Nature Geoscience identifies a potassium isotopic anomaly, showing potassium isotopes can trace Earth's building blocks and reveal insights into its formation.
Nicole Nie, co-lead author at MIT, says the findings provide direct evidence of the early composition altered by a catastrophic collision.

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Story summary

Scientists find traces of proto-Earth in ancient rocks from Greenland, Canada, and Hawaii, dating to about 4.5 billion years ago.
The Massachusetts Institute of Technology study in Nature Geoscience identifies a potassium isotopic anomaly, showing potassium isotopes can trace Earth's building blocks and reveal insights into its formation.
Nicole Nie, co-lead author at MIT, says the findings provide direct evidence of the early composition altered by a catastrophic collision.