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Professor Dave Explains
History of the Earth Part 1: Hadean, Archean, and Proterozoic Eons
If we are going to learn about the Earth, we had better start from the beginning! The Hadean, Archean, and Proterozoic eons will take us all the way from the formation of the Earth, 4.6 billion years ago, until about half a billion years...
PBS
Pbs Learning Media: Life's Rocky Start Banded Iron Formations
Learn how life on early Earth triggered the formation of vast deposits of iron in this video. View the stunning iron rich rocks in Australia that were created by early life. Closed caption available. [3:20]