This is a paleographic reconstruction of the Earth 260 million years ago - a computer simulation showing where the continents were likely located at this point in history. (Image courtesy of Ron Blakey. Used with permission.)
The interactive Earth system: Biology in geologic, environmental and climate change throughout Earth history. Since life began it has continually shaped and re-shaped the atmosphere, hydrosphere, cryosphere and the solid earth. Introduces the concept of "life as a geological agent" and examines the interaction between biology and the earth system during the roughly 4 billion years since life first appeared. Topics include the origin of the solar system and the early Earth atmosphere; the origin and evolution of life and its influence on climate up through and including the modern age and the problem of global warming; the global carbon cycle; and astrobiology.