Recent discoveries in genetics, microbiology, astrobiology, and astrophysics indicates that life in the Milky Way galaxy began in nebular clouds over 10 billion years ago. Given the trillions upon trillions of galaxies which exist in the Hubble length (observable) universe, and the trillions of trillions of supernovas which must have taken place in these galaxies collectively, and thus the innumerable stellar and nebular clouds filled with all the ingredients necessary for life, according to the controversial theories of Rhawn Joseph, of the Brain Research Laboratory and Rudolf Schild of the Harvard-Smithsonian Center for Astrophysics, "it can be deduced that life would have been created, independently, perhaps in numerous galaxies, including the Milky Way long before our planet was formed.
The cosmos may be awash with every conceivable form of life. It can be predicted that every planet orbiting a star in every galaxy in the cosmos might have been contaminated with life and that life would flourish, diversify, and then evolve into increasingly complex, sentient and intelligent animals on worlds which orbit within the habitable zone of their sun. This would mean that intelligent beings may have evolved on billions of planets and may have reached our own level of neurological and cognitive development billions of years before Earth came into being."
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