The Bruce Murray Space Image Library
Impact on an Ancient earth, by Don Davis
Filed under pretty pictures, art, Earth impact hazard, impact cratering, Late Heavy Bombardment, solar system formation
During the first few hundred million years after oceans appeared on the young Earth, life may have repeatedly begun only to be erased in planetwide sterilization events as very large planetoids were colliding with the larger worlds. In time the frequency and sizes of impact events dwindled, allowing stable conditions for life to develop over billions of years.
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