The field of neuroscience has advanced our understanding of the human brain by leaps and bounds in recent decades. We now know the regions of the right and left hemispheres that are responsible for speech, movement, emotional response and other essential functions. Still, much of the brain’s complexity remains illusive and indefinable. At the center of this uncertainty is one of the most fundamental existential questions in the history of our species: what is the source of our consciousness? “The Ultimate Truth” examines the scientific clues that could enable us to isolate the core of our identity.