Labels:box | bulletin board | hakham | tribute album OCR: These forces were gradually joined by the global effects of the emergence of life Exploring this past offers uS the only possibility of understanding the origin of life and perhaps its future EARTH SEEN FROM SPACE has changed dramatically. One hundred million years after 11 had formed some 35 billion years ago the planet was probably undergoing meteor bombardment (left) At this time It may have been studded with volcanic islands and shrouded by an atmosphere laden with carbon dloxide and heavy with clouds Three billion years ago its face may have been obscured by an orange haze of methane, the product of early organisms (center) Today clouds, oceans and continents are clearly discernible (right). This Illustratlon was prepared with the help of James Kasting of Pennsyivanla State University ...
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