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The Precambrian was a period of Earth history which spanned from 4.5 billion to 542 million BCE. (PROSE: Prehistory Repeating Itself [+]Loading...["Prehistory Repeating Itself (feature)"])
The Precambrian was a period of Earth history which spanned from 4.5 billion to 542 million BCE. (PROSE: Prehistory Repeating Itself [+]Loading...["Prehistory Repeating Itself (feature)"])