The simulation hypothesis suggests that our reality might be a computer-generated simulation. Key figures like Nick Bostrom argue that advanced civilizations could run ancestor simulations, making it statistically likely that we are simulated. Philosophers like David Chalmers explore how consciousness could emerge from digital substrates, while physicists like Melvin Vopson propose that gravity might function as data compression in a simulated universe. This idea challenges our understanding of reality and consciousness, making it a profound philosophical and scientific topic.