Physicist Brian Cox takes you on a breathtaking journey through the unimaginable scale of the universe

 https://www.youtube.com/shorts/KSvCx-EI8f0 

https://www.reddit.com/r/SimulationTheory/comments/1e34h88/skeptical_thoughts_on_the_simulation_hypothesis/

No wonder it's impossible to simulate the entire universe. There is just such a tremendous amount of unknown data and variables.

https://scitechdaily.com/physicists-have-mathematically-proven-the-universe-is-not-a-simulation/

https://www.sciencedaily.com/releases/2025/11/251110021052.htm

https://news.ok.ubc.ca/2025/10/30/ubco-study-debunks-the-idea-that-the-universe-is-a-computer-simulation/ 

https://news.ycombinator.com/item?id=45780821 

While reasonably accurate simulations of other worlds are possible, even a weather modeling supercomputer will have its limitations.

However, it's so much easier to run various semi-accurate simulations of the Earth. While the Earth has a lot of variables, approximate simulations are possible. 

https://en.wikipedia.org/wiki/Simulacron-3 , https://www.goodreads.com/book/show/807801.Simulacron_3 

https://galacticjourney.org/july-30-1964-are-you-for-real-simulacron-3-aka-counterfeit-world-by-daniel-f-galouye/ 

http://scguy318.freeshell.org/Daniel%20Galouye%20-%20Simulacron-3.pdf 

https://www.isfdb.org/cgi-bin/title.cgi?7607  

Are our heads in the cloud? Science fiction or fact? by Richard Dawkins https://simulation-argument.com/dawkins.pdf  

https://www.reddit.com/r/AWLIAS/comments/ip0jpq/are_our_heads_in_the_cloud_richard_dawkins_on_the/

https://www.reddit.com/r/ChurchOfMatrix/comments/ip0jg7/are_our_heads_in_the_cloud_richard_dawkins_on_the/ 

https://www.reddit.com/r/SimulationTheory , https://www.youtube.com/watch?v=pi61RfhwYDI&t=18s

https://www.reddit.com/user/GodIsACoder

https://www.reddit.com/r/ChurchOfMatrix