A long theoretical idea is facing new tests.

In March, researchers across physics, computer science, and cosmology began revisiting an old question with new tools. The idea that reality could be simulated has long lived on the fringes of philosophy, but recent studies have pushed it into measurable territory. Patterns in physics, limits of computation, and strange regularities in nature are being examined with fresh urgency. None of the findings prove anything outright. But together, they raise uncomfortable questions about whether the universe behaves like something built.



