Extraterrestrial life, commonly referred to as alien life, is the life that does not originate from the Earth. Some cosmologists believe alien life ranges from simple bacteria-like organisms to civilizations that are far more advanced than that of human beings.
Some exobiologists also suspect that alien life exists, although there is no empirical evidence to prove it. Exobiology is the knowledge and study of alien life. Continue reading Prof. Stephen Hawking Says Alien Life is Real, Warns Humans Not to Make Contact