--- title: These Mini Brains Just Learned to Solve a Classic... description: Researchers at UC Santa Cruz trained cortical brain organoids (mini brains grown from mouse stem cells) to solve the classic cartpole balancing problem using... canonical: https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: These Mini Brains Just Learned to Solve a Classic Engineering Problem | daily.dev og:description: Researchers at UC Santa Cruz trained cortical brain organoids (mini brains grown from mouse stem cells) to solve the classic cartpole balancing problem using... og:url: https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp og:image: https://api.daily.dev/og/posts/n5BZDGeMP.png og:image:alt: These Mini Brains Just Learned to Solve a Classic Engineering Problem og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # These Mini Brains Just Learned to Solve a Classic Engineering Problem **[Singularity Hub](https://daily.dev/sources/singularityhub)** · 6 min read · 9 upvotes · 0 comments ## Summary Researchers at UC Santa Cruz trained cortical brain organoids (mini brains grown from mouse stem cells) to solve the classic cartpole balancing problem using electrical stimulation as feedback. Without dopamine-producing neurons, the organoids still learned through reinforcement — improving success rates from 4.5% to 46.5% — by releasing a chemical that strengthens neural connections. The learning faded after ~45 minutes, suggesting short-term memory limitations tied to the organoids' minimal neural architecture. The work advances the field of organoid intelligence and biological computing, demonstrating that adaptive computation is intrinsic to cortical tissue itself. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Biology-based brain model matches animals in learning, enables new discovery](https://daily.dev/posts/biology-based-brain-model-matches-animals-in-learning-enables-new-discovery-izkwee1g9) · MIT News · 0 upvotes · 0 comments - [Meet a mouse whose brain cortex is made up of human cells](https://daily.dev/posts/meet-a-mouse-whose-brain-cortex-is-made-up-of-human-cells-qxnx7jazi) · MIT Technology Review · 0 upvotes · 0 comments - [Scientists Grow Electronics Inside the Brains of Living Mice](https://daily.dev/posts/scientists-grow-electronics-inside-the-brains-of-living-mice-4u7b455pa) · Singularity Hub · 0 upvotes · 0 comments - [A data centre rack running on living neurons is now operating in Singapore](https://daily.dev/posts/a-data-centre-rack-running-on-living-neurons-is-now-operating-in-singapore-ouxfxeuds) · The Next Web · 0 upvotes · 0 comments --- Tags: [#reinforcement-learning](https://daily.dev/tags/reinforcement-learning) [View this post on daily.dev](https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"These Mini Brains Just Learned to Solve a Classic Engineering Problem","url":"https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp"},"datePublished":"2026-03-24T19:40:43.936Z","dateModified":"2026-03-24T19:41:08.865Z","description":"Researchers at UC Santa Cruz trained cortical brain organoids (mini brains grown from mouse stem cells) to solve the classic cartpole balancing problem using...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8b74cb11b3976b8407c345853b61175f?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8b74cb11b3976b8407c345853b61175f?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Singularity Hub","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Singularity Hub","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/8bce4dbf713f430b99844be15c8df028","url":"https://daily.dev/sources/singularityhub"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/these-mini-brains-just-learned-to-solve-a-classic-engineering-problem-n5bzdgemp","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":9},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"reinforcement-learning","timeRequired":"PT6M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Singularity Hub","item":"https://daily.dev/sources/singularityhub"},{"@type":"ListItem","position":3,"name":"These Mini Brains Just Learned to Solve a Classic Engineering Problem"}]} ```