![[Skip the following navigation links]](http://www.santacruzpl.org/graphics/tops/skip.gif){kind=small}
![[ Ready Reference Files Home Page ]](http://www.santacruzpl.org/graphics/tops/topreadyref.gif){kind=small}
![[ Website Search Form ]](http://www.santacruzpl.org/graphics/tops/photosearch.gif){kind=small}
![[ Santa Cruz Public Libraries Home Page ]](http://www.santacruzpl.org/graphics/tops/photohome.gif){kind=small}
In Chapter 1 of The Dragons of Eden, Carl Sagan proposes compressing the history of the universe into one year, and then seeing where in that year various events of interest fall. Based on this model, Sagan calculates that if the Big Bang takes place on January 1, the origin of our solar system will be in mid-September, and the first appearance of humans on Earth does not take place until late evening on the 31st of December. See Carl Sagan, The Dragons of Eden, pp.13-17. (573.2 Sa1)
Source: Sagan, Carl. The Dragons of Eden: Speculations on the Evolution of Human Intelligence. Random House, New York, NY, 1977.
Verified by: GM, 4/98
Disclaimer:
While the Library has verified the information presented in these files in what it considers to be reliable and authoritative sources, it cannot take responsibility for nor guarantee the accuracy of the information presented.