Bruce Murray Space Image Library

Impact on an Ancient earth, by Don Davis

Impact on an Ancient earth, by Don Davis
Impact on an Ancient earth, by Don Davis 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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