The sum: All that lead to one

Feynman's path integral formulation constitutes a landmark in fundamental physics. What's even more intriguing is its far-reaching implication in many areas of physics. It provides a useful tool to look into the emerging spacetime events , waves and particles.

More read below:

https://www.quantamagazine.org/how-our-reality-may-be-a-sum-of-all-possible-realities-20230206/