# The ultimate aim of the modern movement in biology is to explain all biology in terms of… by Francis Crick > "The ultimate aim of the modern movement in biology is to explain all biology in terms of physics and chemistry." > **— Francis Crick**, *Of Molecules and Men (1966), excerpt candidate* Verification Status: Unverified — exact wording/source has not yet been independently confirmed against a primary source; source clue: Of Molecules and Men (1966), excerpt candidate.