From the Book - Regular Print - Second edition.
An explanation for the absence of extraterrestrials on earth / Michael H. Hart
One attempt to find where they are : NASA's high resolution microwave survey / Jill Tarter
An examination of claims that extraterrestrial visitors to earth are being observed / Robert Sheaffer
The likelihood of interstellar colonization, and the absence of its evidence / Sebastian Von Hoerner - Pre-emption of the galaxy by the first advanced civilization / Ronald Bracewell
Stellar evolution : motivation for mass interstellar migrations / Ben Zuckerman
Interstellar propulsion systems / Freeman Dyson
Interstellar travel : a review / Ian A. Crawford
Settlements in space, and interstellar travel / Cliff Singer
Terraforming / James Oberg
Estimates of expansion timescales / Eric M. Jones
A search for tritium sources in our solar system may reveal the presence of space probes from other stellar systems / Michael D. Papagiannis
Primordial organic cosmochemistry / Cyril Ponnamperuma and Rafael Navarro-Gonzalez
Chance and the origin of life / Edward Argyle
The RNA world : life before DNA and protein / Gerald F. Joyce
The search for extraterrestrial intelligence / Ernst Mayr
Alone in a crowded universe / Jared Diamond
Possible forms of life in environments very different from the earth / Robert Shapiro and Gerald Feinberg
Cosmological SETI frequency standards / J. Richard Gott, III
Galactic chemical evolution : implications for the existence of habitable planets / Virginia Trimble
The frequency of planetary systems in the galaxy / Jonathan I. Lunine
Atmospheric evolution, the Drake equation and DNA : sparse life in an infinite universe / Michael H. Hart.