The moon's evolutionary history is divided into three distinct phases based on the temporal interplay of exogenic and endogenic processes in altering the moon. These phases are defined as Eon-level ...
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Travel through Earth's 4.54 billion-year story
Earth’s history spans 4.54 billion years, and scientists use the geologic time scale to divide it into eons, eras, periods, and epochs. By studying rock layers, fossils, and isotopes, they can ...
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