人类可能根本没有机会收到外星文明发出的信号

Core Viewpoint - The article discusses the "Dead Internet Theory," which posits that most online content is generated by AI and robots rather than humans, leading to a lack of genuine human interaction on the internet [2] Group 1: Theories on Extraterrestrial Civilizations - Various theories have been proposed to explain the lack of contact with extraterrestrial civilizations, including the idea that life may not find a way to evolve, Earth being a zoo, or civilizations self-destructing upon reaching advanced capabilities [3] - Carl Sagan suggested that as extraterrestrial civilizations advance, their technology may become too sophisticated for us to communicate with, leading to a "communication horizon" [3] Group 2: Technological Acceleration and Its Implications - Sagan predicted that a civilization could reach a level of technological advancement beyond our observational capabilities in about 1,000 years [4] - The rapid development of artificial intelligence (AI) is highlighted as a significant change in human society, with the potential for AI to evolve into a superintelligence that could surpass human capabilities [4] Group 3: Implications for the Search for Extraterrestrial Intelligence (SETI) - Research indicates that considering the exponential growth of technology and the potential prevalence of non-biological intelligence, the window for detecting extraterrestrial signals may be significantly reduced to just 10 to 20 years [5] - This reduction in the detection window suggests that the probability of discovering extraterrestrial civilizations is essentially zero, which may explain the "Great Silence" described in the Fermi Paradox [5]