| | Encyclopedia :: encyclopedia : Encyclopedia Galactica (Site not responding. Last check: 2007-10-22) |
 | | The Encyclopedia Galactica is a fictional or hypothetical encyclopedia of a future galaxy-spanning civilization, containing all the knowledge accumulated by a society with trillions of people and thousands of years of history. |
 | | In it, Sagan suggests that such an encyclopedia might be broadcast into space and could possibly be received through radioastronomy (see SETI). |
 | | For Earth, he speculates that the probability of survival might be viewed by other civilizations as only 40% per 100 years, reflecting the Cold War conditions of the time the documentary was made. |
| www.hallencyclopedia.com /Encyclopedia_Galactica (394 words) |