Although the multiverse as a whole may not be a testable scientific hypothesis, with some luck we may at least know if one or a few other universes exist.
— 13.7: Cosmos and Culture, NPR
Many cosmologists now believe that this observable universe is just a tiny, if relentlessly expanding, patch of space-time embedded in a greater universal fabric that is, in a profound sense, infinite.
— The New York Times
For centuries, paradoxes have helped physicists and philosophers challenge and deepen their understanding of how our world works.
— The Nature of Reality, NOVA
Foundational Questions Institute