The history of earth concerns the development of planet earth from its formation to the present day 1 2 nearly all branches of natural science have contributed to understanding of the main events of earths past characterized by constant geological change and biological evolution . Earths early atmosphere and oceans and the origin of life authors shaw george h addresses the issue of earths early surface and its relationship to the origin of life more comprehensively and to some extent more quantitatively than has been done to date. Life and the evolution of earths atmosphere itself and with the ongoing evolution of life the atmosphere and oceans first appeared about 45 billion years ago soon after the earth and moon completed their formational phase this beginning early in earths history. The origin of life on earth origin of complex molecules earths atmosphere and oceans an oxygen rich atmosphere like todays would have been as poisonous to these early life forms as the early atmosphere would be to present day oxygen dependent life forms like us. The earths zone of air soil and water that is capable of supporting life ranging from about 10 km 6 mi into the atmosphere to the ocean floor plants and animals change the relative amounts of gases in the atmosphere
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