r/TodayILearned is a popular subreddit on the social media platform Reddit, where users share interesting facts and knowledge they have recently discovered. The community encourages learning and curiosity, allowing members to post tidbits of information that may surprise or educate others. Each post typically includes a brief explanation and a source for verification. The subreddit covers a wide range of topics, from history and science to pop culture and unusual trivia. Users often engage in discussions, asking questions or sharing related experiences, making it a vibrant space for knowledge exchange. Popular posts frequently receive upvotes, highlighting the most intriguing facts shared by the community.