{"687989":{"#nid":"687989","#data":{"type":"news","title":"Is the Whole Universe Just a\u00a0Simulation?","body":[{"value":"\u003Cdiv class=\u0022theconversation-article-body\u0022\u003E\u003Cblockquote\u003E\u003Cp\u003E\u003Cstrong\u003EIs the whole universe just a simulation? \u2013 Moumita B., age 13, Dhaka, Bangladesh\u003C\/strong\u003E\u003C\/p\u003E\u003C\/blockquote\u003E\u003Chr\u003E\u003Cp\u003EHow do you know anything is real? Some things you can see directly, like your fingers. Other things, like your chin, you need a mirror or a camera to see. Other things can\u2019t be seen, but you believe in them because a parent or a teacher told you, or you read it in a book.\u003C\/p\u003E\u003Cp\u003EAs a \u003Ca href=\u0022https:\/\/www.physics.gatech.edu\/user\/d-zeb-rocklin\u0022\u003Ephysicist\u003C\/a\u003E, I use sensitive scientific instruments and complicated math to try to figure out what\u2019s real and what\u2019s not. But none of these sources of information is entirely reliable: Scientific measurements can be wrong, my calculations can have errors, even your eyes can deceive you, like the \u003Ca href=\u0022https:\/\/www.cnbc.com\/2015\/02\/27\/the-dress-that-broke-the-internet.html\u0022\u003Edress that broke the internet\u003C\/a\u003E because nobody could agree on what colors it was.\u003C\/p\u003E\u003Cp\u003EBecause every source of information \u2013 even your teachers \u2013 can trick you some of the time, some people have always wondered \u003Ca href=\u0022https:\/\/reasonandmeaning.com\/2022\/01\/23\/do-we-know-anything-for-sure\/\u0022\u003Ewhether we can ever trust any information\u003C\/a\u003E.\u003C\/p\u003E\u003Cp\u003EIf you can\u2019t trust anything, are you sure you\u2019re awake? Thousands of years ago, Chinese philosopher \u003Ca href=\u0022https:\/\/plato.stanford.edu\/entries\/zhuangzi\/\u0022\u003EZhuangzi dreamed he was a butterfly\u003C\/a\u003E and realized that he might actually be a butterfly dreaming he was a human. Plato wondered whether all we see could just be shadows of true objects. Maybe the world we live in our whole lives inside isn\u2019t the real one, maybe it\u2019s more like a big video game, or the movie \u201c\u003Ca href=\u0022https:\/\/www.warnerbros.com\/movies\/matrix\u0022\u003EThe Matrix\u003C\/a\u003E.\u201d\u003C\/p\u003E\u003Cfigure class=\u0022align-center zoomable\u0022\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=1000\u0026amp;fit=clip\u0022\u003E\u003Cimg alt=\u0022screenshot of a landscape in a cartoonish video game\u0022 src=\u0022https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=754\u0026amp;fit=clip\u0022 srcset=\u0022https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=375\u0026amp;fit=crop\u0026amp;dpr=1 600w, https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=375\u0026amp;fit=crop\u0026amp;dpr=2 1200w, https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=600\u0026amp;h=375\u0026amp;fit=crop\u0026amp;dpr=3 1800w, https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=45\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=471\u0026amp;fit=crop\u0026amp;dpr=1 754w, https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=30\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=471\u0026amp;fit=crop\u0026amp;dpr=2 1508w, https:\/\/images.theconversation.com\/files\/707999\/original\/file-20251211-56-la328h.png?ixlib=rb-4.1.0\u0026amp;q=15\u0026amp;auto=format\u0026amp;w=754\u0026amp;h=471\u0026amp;fit=crop\u0026amp;dpr=3 2262w\u0022 sizes=\u0022(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px\u0022\u003E\u003C\/a\u003E\u003C\/p\u003E\u003Cfigcaption\u003E\u003Cspan class=\u0022caption\u0022\u003EAre we living in a very sophisticated version of Minecraft?\u003C\/span\u003E \u003Ca class=\u0022source\u0022 href=\u0022https:\/\/commons.wikimedia.org\/wiki\/File:Un_paysage_de_Minecraft.png\u0022\u003E\u003Cspan class=\u0022attribution\u0022\u003ETofli IV\/Wikimedia Commons\u003C\/span\u003E\u003C\/a\u003E\u003Cspan class=\u0022attribution\u0022\u003E, \u003C\/span\u003E\u003Ca class=\u0022license\u0022 href=\u0022http:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/\u0022\u003E\u003Cspan class=\u0022attribution\u0022\u003ECC BY-SA\u003C\/span\u003E\u003C\/a\u003E\u003C\/figcaption\u003E\u003C\/figure\u003E\u003Ch2\u003EThe Simulation Hypothesis\u003C\/h2\u003E\u003Cp\u003EThe simulation hypothesis is a modern attempt to use logic and observations about technology to finally answer these questions and prove that we\u2019re probably living in something like a giant video game. Twenty years ago, a philosopher named \u003Ca href=\u0022https:\/\/scholar.google.com\/citations?user=oQwpz3QAAAAJ\u0026amp;hl=en\u0022\u003ENick Bostrom\u003C\/a\u003E made \u003Ca href=\u0022https:\/\/simulation-argument.com\/simulation.pdf\u0022\u003Esuch an argument\u003C\/a\u003E based on the fact that video games, virtual reality and artificial intelligence were improving rapidly. That trend has continued, so that today people can jump into immersive virtual reality or talk to seemingly conscious artificial beings.\u003C\/p\u003E\u003Cp\u003EBostrom projected these technological trends into the future and imagined a world in which we\u2019d be able to realistically simulate trillions of human beings. He also suggested that if someone could create a simulation of you that seemed just like you from the outside, it would feel just like you inside, with all of your thoughts and feelings.\u003C\/p\u003E\u003Cp\u003ESuppose that\u2019s right. Suppose that sometime in, say, the 31st century, humanity will be able to simulate whatever they want. Some of them will probably be fans of the 21st century and will run many different simulations of our world so that they can learn about us, or just be amused.\u003C\/p\u003E\u003Cp\u003EHere\u2019s Bostrom\u2019s shocking logical argument: If the 21st century planet Earth only ever existed one time, but it will eventually get simulated trillions of times, and if the simulations are so good that the people in the simulation feel just like real people, then you\u2019re probably living on one of the trillions of simulations of the Earth, not on the one original Earth.\u003C\/p\u003E\u003Cp\u003EThis argument would be even more convincing if you actually could run powerful simulations today, but as long as you believe that people will run those simulations someday, then you logically should believe that you\u2019re probably living in one today.\u003C\/p\u003E\u003Cfigure\u003E\u003Cp\u003E\u003Ciframe width=\u0022440\u0022 height=\u0022260\u0022 src=\u0022https:\/\/www.youtube.com\/embed\/pmcrG7ZZKUc?wmode=transparent\u0026amp;start=0\u0022 frameborder=\u00220\u0022 allowfullscreen=\u0022\u0022\u003E\u003C\/iframe\u003E\u003C\/p\u003E\u003Cfigcaption\u003E\u003Cspan class=\u0022caption\u0022\u003EScientist Neil deGrasse Tyson explains the simulation hypothesis and why he thinks the odds are about 50-50 we\u2019re part of a virtual reality.\u003C\/span\u003E\u003C\/figcaption\u003E\u003C\/figure\u003E\u003Ch2\u003ESigns We\u2019re Living in a Simulation \u2026Or Not\u003C\/h2\u003E\u003Cp\u003EIf we are living in a simulation, does that explain anything? Maybe the simulation has glitches, and that\u2019s why your phone wasn\u2019t where you were sure you left it, or how you knew something was going to happen before it did, or why that dress on the internet looked so weird.\u003C\/p\u003E\u003Cp\u003EThere are more fundamental ways in which our world resembles a simulation. There is a \u003Ca href=\u0022https:\/\/kids.kiddle.co\/Planck_length\u0022\u003Eparticular length\u003C\/a\u003E, much smaller than an atom, beyond which physicists\u2019 theories about the universe break down. And we can\u2019t see anything more than about 50 billion light-years away because the \u003Ca href=\u0022https:\/\/theconversation.com\/curious-kids-what-does-the-edge-of-the-universe-look-like-233111\u0022\u003Elight hasn\u2019t had time to reach us\u003C\/a\u003E since the Big Bang. That sounds suspiciously like a computer game where you can\u2019t see anything smaller than a pixel or anything beyond the edge of the screen.\u003C\/p\u003E\u003Cp\u003EOf course, there are other explanations for all of that stuff. Let\u2019s face it: You might have misremembered where you put your phone. But Bostrom\u2019s argument doesn\u2019t require any scientific proof. It\u2019s logically true as long as you really believe that many powerful simulations will exist in the future. That\u2019s why famous scientists like Neil deGrasse Tyson and tech titans like Elon Musk have been convinced of it, though Tyson now puts the odds at 50-50.\u003C\/p\u003E\u003Cp\u003EOthers of us are more skeptical. The technology required to run such large and realistic simulations is so powerful that Bostrom describes such simulators as godlike, and he admits that humanity may never get that good at simulations. Even though it is far from being resolved, the simulation hypothesis is an impressive logical and philosophical argument that has challenged our fundamental notions of reality and captured the imaginations of millions.\u003C\/p\u003E\u003Chr\u003E\u003Cp\u003E\u003Cem\u003EHello, curious kids! Do you have a question you\u2019d like an expert to answer? Ask an adult to send your question to \u003C\/em\u003E\u003Ca href=\u0022mailto:curiouskidsus@theconversation.com\u0022\u003E\u003Cem\u003ECuriousKidsUS@theconversation.com\u003C\/em\u003E\u003C\/a\u003E\u003Cem\u003E. Please tell us your name, age and the city where you live.\u003C\/em\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003EAnd since curiosity has no age limit \u2013 adults, let us know what you\u2019re wondering, too. We won\u2019t be able to answer every question, but we will do our best.\u003C\/em\u003E\u003C!-- Below is The Conversation\u0027s page counter tag. Please DO NOT REMOVE. --\u003E\u003Cimg style=\u0022border-color:!important;border-style:none;box-shadow:none !important;margin:0 !important;max-height:1px !important;max-width:1px !important;min-height:1px !important;min-width:1px !important;opacity:0 !important;outline:none !important;padding:0 !important;\u0022 src=\u0022https:\/\/counter.theconversation.com\/content\/268177\/count.gif?distributor=republish-lightbox-basic\u0022 alt=\u0022The Conversation\u0022 width=\u00221\u0022 height=\u00221\u0022 referrerpolicy=\u0022no-referrer-when-downgrade\u0022\u003E\u003C!-- End of code. If you don\u0027t see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https:\/\/theconversation.com\/republishing-guidelines --\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cem\u003EThis article is republished from \u003C\/em\u003E\u003Ca href=\u0022https:\/\/theconversation.com\u0022\u003E\u003Cem\u003EThe Conversation\u003C\/em\u003E\u003C\/a\u003E\u003Cem\u003E under a Creative Commons license. Read the \u003C\/em\u003E\u003Ca href=\u0022https:\/\/theconversation.com\/is-the-whole-universe-just-a-simulation-268177\u0022\u003E\u003Cem\u003Eoriginal article\u003C\/em\u003E\u003C\/a\u003E\u003Cem\u003E.\u003C\/em\u003E\u003C\/p\u003E\u003C\/div\u003E","summary":"","format":"full_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EHow do you know anything is real? Some things you can see directly, like your fingers. Other things, like your chin, you need a mirror or a camera to see. Other things can\u2019t be seen, but you believe in them because a parent or a teacher told you, or you read it in a book.\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"How do you know anything is real? Some things you can see directly, like your fingers. Other things, like your chin, you need a mirror or a camera to see."}],"uid":"27469","created_gmt":"2026-02-03 13:16:36","changed_gmt":"2026-04-01 13:19:50","author":"Kristen Bailey","boilerplate_text":"","field_publication":"","field_article_url":"","location":"Atlanta, GA","dateline":{"date":"2026-02-02T00:00:00-05:00","iso_date":"2026-02-02T00:00:00-05:00","tz":"America\/New_York"},"extras":[],"hg_media":{"679171":{"id":"679171","type":"image","title":"Could the Earth and everything on it \u2013 and even the whole universe \u2013 be a simulation running on a giant computer? OsakaWayne Studios\/Moment via Getty Images","body":"\u003Cp\u003ECould the Earth and everything on it \u2013 and even the whole universe \u2013 be a simulation running on a giant computer? \u003Ca href=\u0022https:\/\/www.gettyimages.com\/detail\/photo\/planet-earth-from-space-with-cubical-segments-royalty-free-image\/1344831100\u0022\u003EOsakaWayne Studios\/Moment via Getty Images\u003C\/a\u003E\u003C\/p\u003E","created":"1770124682","gmt_created":"2026-02-03 13:18:02","changed":"1770124682","gmt_changed":"2026-02-03 13:18:02","alt":"Could the Earth and everything on it \u2013 and even the whole universe \u2013 be a simulation running on a giant computer? OsakaWayne Studios\/Moment via Getty Images","file":{"fid":"263299","name":"file-20251211-56-lzhkg5.jpg","image_path":"\/sites\/default\/files\/2026\/02\/03\/file-20251211-56-lzhkg5.jpg","image_full_path":"http:\/\/hg.gatech.edu\/\/sites\/default\/files\/2026\/02\/03\/file-20251211-56-lzhkg5.jpg","mime":"image\/jpeg","size":217589,"path_740":"http:\/\/hg.gatech.edu\/sites\/default\/files\/styles\/740xx_scale\/public\/2026\/02\/03\/file-20251211-56-lzhkg5.jpg?itok=VLC3NXiR"}}},"media_ids":["679171"],"related_links":[{"url":"https:\/\/theconversation.com\/is-the-whole-universe-just-a-simulation-268177","title":"Read This Article on The Conversation"}],"groups":[{"id":"1278","name":"College of Sciences"},{"id":"660369","name":"Matter and Systems"},{"id":"1188","name":"Research Horizons"},{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[{"id":"187915","name":"go-researchnews"}],"core_research_areas":[{"id":"193652","name":"Matter and Systems"}],"news_room_topics":[{"id":"71911","name":"Earth and Environment"}],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Ch5\u003EAuthor:\u003C\/h5\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/theconversation.com\/profiles\/zeb-rocklin-2510395\u0022\u003EZeb Rocklin\u003C\/a\u003E, Associate Professor of Physics, \u003Ca href=\u0022https:\/\/theconversation.com\/institutions\/georgia-institute-of-technology-1310\u0022\u003EGeorgia Institute of Technology\u003C\/a\u003E\u003C\/p\u003E\u003Ch5\u003EMedia Contact:\u003C\/h5\u003E\u003Cp\u003EShelley Wunder-Smith\u003Cbr\u003E\u003Ca href=\u0022mailto:shelley.wunder-smith@research.gatech.edu\u0022\u003Eshelley.wunder-smith@research.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}