The antediluvian period is the time period chronicled in the Bible between the fall of man and the Genesis flood narrative in biblical cosmology. The term was coined by Thomas Browne. The narrative takes up chapters 1–6 of the Book of Genesis. The term found its way into early geology and science until the late Victorian era. Colloquially, the term is used to refer to any ancient and murky period.

The fall of man, the fall of Adam, or simply the Fall, is a term used in Christianity to describe the transition of the first man and woman from a state of innocent obedience to God to a state of guilty disobedience. The doctrine of the Fall comes from a biblical interpretation of Genesis, chapters 1–3. At first, Adam and Eve lived with God in the Garden of Eden, but the serpent tempted them into eating the fruit from the tree of knowledge of good and evil, which God had forbidden. After doing so, they became ashamed of their nakedness and God expelled them from the Garden to prevent them from eating the fruit of the tree of life and becoming immortal.