It is a scientific fact that the seeds of life are common and spread
throughout the universe.  When the seeds of life residing on a large
rock at the right distance from an average size star are bathed by
star lit liquid water and protected by a stable atmosphere for a
period of time, they will flourish, evolve and differentiate into
domains, kingdoms, phyla, classes, orders, families, genera and
species. Earth is one such rock in the universe.