TodayILearnedTIL

Reddit 2010-12 education active Updated 2026-02-20
Early 2010s Massive scale 1.2 billion+ lifetime posts

First documented in December 2010 on Reddit. Currently active and in regular use across social platforms since 2010.

Also known as: TILtoday i learnedreddit til

Fact-Sharing Phenomenon

r/todayilearned (TIL) - Reddit’s largest educational community sharing interesting facts - grew to 30M+ subscribers making “TIL” internet shorthand for discovering surprising information.

Format: “TIL [interesting fact with source]”; Wikipedia links common; obscure historical facts, science, weird trivia

Viral moments: Mind-blowing facts spreading beyond Reddit; Twitter, Facebook sharing TIL discoveries

Famous TILs: Steve Buscemi 9/11 firefighter, Keanu Reeves subway kindness, historical coincidences

Steve Buscemi curse: His 9/11 fact reposted so frequently it became meme about TIL reposts

Educational value: Introduced millions to interesting facts; Wikipedia traffic surges from TIL posts

Source requirement: Must link credible source; preventing misinformation; mods strict about verification

Repost problem: Popular facts cycling endlessly; “TIL Steve Buscemi…” every few months

Crossover: TIL format spread to other platforms; Twitter threads, TikTok fact videos

“Years old today” posts: Celebrities’ birthdays, historical anniversaries driving engagement

TIL demonstrates social media’s educational potential - crowd-sourced interesting facts creating viral learning moments.

Sources:
https://www.reddit.com/r/todayilearned/
https://www.wired.com/

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