Xenology: An Introduction to the Scientific Study of Extraterrestrial Life, Intelligence, and Civilization
© 1975-1979, 2008 Robert A. Freitas Jr. All Rights Reserved.
Robert A. Freitas Jr., Xenology: An Introduction to the Scientific Study of Extraterrestrial Life, Intelligence, and Civilization, First Edition, Xenology Research Institute, Sacramento, CA, 1979; http://www.xenology.info/Xeno.htm
17.4 Exotic Propulsion Systems
The exotic interstellar propulsion systems discussed in this section are all at the "idea" stage in human technological development. There is no guarantee that any or all of them can be made to work. A few have some theoretical support, but many do not.
Nevertheless, xenologists deem them important because of the likelihood that some may have advanced to the "profit" stage of exploitation in at least a few extraterrestrial Type II or Type III technological civilizations.
Last updated on 6 December 2008