Contact With Alien Civilizations - Michael A.G.

Page 453 of 472

Page 453 of 472
Contact With Alien Civilizations - Michael A.G.

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References 441 58. William I. Newman and Carl Sagan, “Galactic Civilizations: Population Dynamics and Interstellar Diffusion,” Icarus, Vol. 46 (1981), 293-327. 59. Swift, 112. 60. Shklovskii and Sagan, 464; Congressional Research Service, “Possibility of Intelligent Life Elsewhere in the Universe.” 61. Clark and Clark, 212-213. 62. Asimov, A Choice of Catastrophes, 265; Ulmschneider, 214. This Asimov estimate seems inconsistent with the much larger distance he proposed in his book Extraterrestrial Civilizations, page 192. 63. Barrow and Tipler, 585; Newman and Sagan, “Galactic Civilizations.” 64. Barrow and Tipler, 586, 594. 65. Robert Ardrey, The Territorial Imperative: A Personal Inquiry into the Animal Origins of Property and Nations, New York, Dell, 1966 (Laurel Edition, 1971), 295. 66. Project Cyclops, 31. 67. MacVey, Interstellar Travel, 232. 68. Sebastian von Hoerner, Population Explosion and Interstellar Expansion, Gottingen, Germany, Vandenhoek and Ruprecht, as paraphrased by Alfred Roulet, The Search for Intelligent Life in Outer Space, 121-124. 69. Harrison, “Slow Track, Fast Track.” 70. Sagan, Cosmos, 308. 71. Barrow and Tipler, 596. 72. John Kraus, “Gerard K. O’Neill on Space Colonization and SETI,” Cosmic Search, Vol. 1, Number 2 (March 1979), 16-23. 73. Richard Burke-Ward, “Possible Existence of Extra-Terrestrial Technology in the Solar System,” JBIS, Vol. 53 (2000), 2-12; Rood and Trefil, 241. 74. Charles Pellegrino and George Zebrowski, The Killing Star, New York, William Morrow, 1995. 75. Ulmschneider, 226. 76. Mark Pagel and Ruth Mace, “The Cultural Wealth of Nations,” Nature, Vol. 428 (18 March 2004), 275-278. 77. Harrison, After Contact, 182. 78. White, 103-104. 79. Harrison, “Slow Track, Fast Track.” 80. Bracewell, The Galactic Club, 75. 81. Clarke, Profiles of the Future, 118-119; Greetings, 207. 82. Arthur C. Clarke, Foreword to 2001: A Space Odyssey, Hutchison Radius, 1968; reissued by Roc (New American Library) in 2000, xx. 83. Stapledon, 356. 84. James Gunn, The Illustrated History of Science Fiction, 169. 85. Groff Conklin, Invaders of Earth, New York, Pocket Books, 1955, ix. 86. Gunn, Alternate Worlds, 225-226. 87. Harrison, “Slow Track, Fast Track.” 88. Harrison, After Contact, 175. 89. Huntington, 51. 90. Padgen, xxi; Henry A. Kissinger, Diplomacy, New York, Simon and Schuster, 1994, 21. 91. Dmitri Simes, “America’s Imperial Dilemma,” Foreign Affairs, Vol. 83, Number 2 (November-December 2003), 91-102; Kissinger, 21.