Where Are All The Aliens?: Fermi's Paradox Explained

Source: International Business Times

"Where is everybody?": This question, about the lack of aliens in the vast universe, is called Fermi's paradox AFP Astronomers raised hopes that humanity might not be alone in the universe by announcing on Thursday they have detected the most promising hints yet of life on a distant planet. But given the age and vastness of the universe, a different question has long puzzled some scientists: why haven't we already come in contact with aliens?"Where is everybody?" Enrico Fermi asked fellow famous physicists including Edward Teller over lunch in 1950. This quandary was named Fermi's Paradox.