The Early Earth: Physical, Chemical and Biological Development

摘要: The geological record gleaned from scrutinizing ancient rocks is the only direct source of information regarding physical, chemical, and biological evolution Earth. Such studies provide to geophysicists geochemists who puzzle over planetary heat structure, biologists seek place element time within their reconstructions emergence phylogenetic diversity past decade has seen a resurgence interest in first 2 billion years Earth history. Reports emerge with increasing frequency nature timing formation volatile envelopes planets, early bombardments contribution eventual chemical makeup all atmosphere, antiquity biosphere. Each these intrinsic science, uncertainties details continue uphold reputation field Archean for active, often strenuous debate.