The Invisible Century is an original look at two of the most important revolutionsâ€”and revolutionariesâ€”of the modern era. This dual biography of Albert Einstein and Sigmund Freudâ€” and their parallel journeys of discovery that altered forever our understanding of the very nature of reality. Einstein and Freud were the foremost figures in search of the next level of scientific knowledgeâ€”evidence we canâ€™t see. Here on the frontier of the invisible, their investigations reached unprecedented realmsâ€”relativity and the unconsciousâ€”and spawned the creation of two new sciences, cosmology and psychoanalysis. Together they have allowed us for more than a hundred years to explore previously unimaginable universes without and within.