Great Filter Theory: Why the Universe Stays Silent
The Great Filter theory explains why we haven't found alien civilizations despite billions of potentially habitable planets: somewhere between lifeless chemistry and galaxy-spanning species, a deadly barrier exists that almost no one crosses. Recent mathematical analysis shows life's spontaneous emergence is astronomically unlikely, while six decades of SETI have detected zero signals. The filter could lie behind us (making Earth a cosmic fluke) or ahead (threatening our survival through nucl...
