Geologists Discover The First Evidence of 4.5-billion-year-old “proto-Earth” – astrobiology.com

  1. Geologists Discover The First Evidence of 4.5-billion-year-old “proto-Earth”  astrobiology.com
  2. Geologists discover the first evidence of 4.5-billion-year-old “proto Earth”  MIT News
  3. Potassium-40 isotopic evidence for an extant…

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