How did life originate? How did life originate? Living things (even ancient organisms like bacteria) are enormously complex. However, all this complexity did not leap fully-formed from the primordial soup. Instead life almost certainly originated in a series of small steps, each building upon the complexity that evolved previously: Simple organic molecules were formed. Multicellularity evolved. The Scale of the Universe.
Biology in Motion. 7.014 Introductory Biology | CosmoLearning Biology. Science & Nature - Human Body and Mind.