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416 References 66. 67. 68. 69. 70. 71. 72. 2. 74. 7S. 76. 771. 2. Lamb, 144. In Bova and Preiss, editors, 310. Swift, 110; Shostak, Sharing The Universe 135. Rood and Trefil, 219; Schaeffer, in Hart and Zuckerman, editors, 20. David W. Schwartzman, “The Absence of Extraterrestrials on Earth and the Prospects for CETI,” in Goldsmith, editor, 264-266. Originally published in Icarus, Vol. 32 (1977), 473-475. Cade, Other Worlds Than Ours, 22. Clark and Clark, 188, 190-196, 222, 243, 255. Sturrock, 149; Swift, “Parallel Universes.” Quoted in Stephen J. Garber, “Searching for Good Science.” Sturrock, 121-122, 125, 153, 169, 255-256; Clark and Clark, 246. Torsten Neubert, “On Sprites and Their Exotic Kin,” Science, Vol. 300 (2 May 2003), 747-749. Sturrock, 155. Sagan, editor, CETI, 189, 228. . Dyson, in G. Seth Shostak, editor, Third Decennial US-USSR Conference on SETI, Astronomical Society of the Pacific, 1993, 434. . Shostak and Barnett, Cosmic Company, 134. . David Viewing, “Directly Interacting Extraterrestrial Technological Com- munities,” JBIS, Vol. 28 (1975) 735-744. . Brin, in Bova and Preiss, editors, 130. 9. 10. 11. . Viewing, “Directly Interacting Extra-Terrestrial § Technological Communities.” . Crowe, 230. . Vladimir Lytkin, Ben Finney, and Liudmila Alepko, “Tsiolkovsky, Russian Cosmism, and Extraterrestrial Intelligence,” QJRAS, Vol. 36 (1995), 369— 376; Albert Harrison, 187-188. . Fort, 162-163. . Finney and Jones, editors, 298-300; Lytkin, et al., 373; Drake and Sobel, 203. . John A. Ball, “The Zoo Hypothesis,” Icarus, Vol. 19 (1973), 347-349, reprinted in Goldsmith, editor, 241-242. . Rood and Trefil, 248. . For an overview of the O’Neill enterprise, see Michael A.G. Michaud, Reach- ing for the High Frontier: The American Pro-Space Movement, 1972-1984, New York, Praeger, 1986, 57-80. Casti, 398. Brin, “The Great Silence.” Mauldin, Prospects for Interstellar Travel, 280. Interacting The Drake Equation: Take Three Why Don’t We See Them? Extra-Terrestrial Technological