Paradigm Shift.

A paradigm shift, a concept brought into the common lexicon by the American physicist and philosopher Thomas Kuhn, is a fundamental change in the basic concepts and experimental practices of a scientific discipline. Even though Kuhn restricted the use of the term to the natural sciences, the concept of a paradigm shift has also been used in numerous non-scientific contexts to describe a profound change in a fundamental model or perception of events.
: An important change that happens when the usual way of thinking about or doing something is replaced by a new and different way..This discovery will bring about a paradigm shift in our understanding of evolution.