@conspiracytheoryworld: A Harvard physicist has calculated that an advanced extraterrestrial civilization utilizing near-light-speed propulsion could theoretically reach Earth in just 16 days. While purely speculative and far beyond current human capabilities, the bold hypothesis forces us to rethink interstellar distances and how we might detect a visitor from another star system. #Extraterrestrial #SpaceMysteries #Astrophysics #Aliens #Theories