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Earth by simihbd is a document available to read on EtoBox.

1) The earliest evidence of life on Earth is around 3.5 billion years ago in the form of simple bacteria. The Earth itself is estimated to be between 4.5-4.7 billion years old. 2) Early conditions on Earth included shallow alkaline seas with a reducing atmosphere containing methane, ammonia, and no oxygen. Over time, this atmosphere was replaced with one containing water vapor, carbon dioxide, and other gases. 3) According to the Gaia hypothesis, life influences and interacts with the atmosphere and surf

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simihbd

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EN