如果宇宙中满是外星人……《WHERE IS EVERYBODY?》，第一版

English | PDF(True) | 2002 | 294 Pages | ISBN : 0387955011 | 12.6 MB

Given the fact that there are perhaps 400 million stars in our Galaxy alone, and perhaps 400 million galaxies in the Universe, it stands to reason that somewhere out there, in the 14-billion-year-old cosmos, there is or once was a civilization at least as advanced as our own. The sheer enormities of the numbers almost demand that we accept the truth of this hypothesis. Why, then, have we encountered no evidence, no messages, no artifacts of these extraterrestrials? Webb discusses in detail the 50 most cogent and intriguing solutions to Fermi's famous paradox: If the numbers strongly point to the existence of extraterrestrial civilizations, why have we found no evidence of them?

鉴于银河系中可能有大约4亿万名星，以及宇宙中有可能有4亿万多个星系，可以理解的是，在130多亿年的宇宙中，至少和我们一样先进的文明可能存在或曾经存在。这些数字的庞大几乎迫使我们必须接受这个假设的真实性。那么，为什么我们还没有发现任何证据、信息或者外星人的遗迹呢？韦布详细讨论了针对著名的“费米悖论”提出的50种最有力且令人着迷的解决方案：如果数字强烈指向外星文明的存在，那为何我们没有找到它们的迹象？

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