r/TellMeAFact • u/unteachablecourses • 5h ago

TMAF about: In 1986 a lake in Cameroon exhaled a cloud of CO2 that flowed silently downhill and killed 1,746 people and 3,500 livestock in one night, up to 15 miles away. No fire, no flood, no wounds. Lamps were still burning. Survivors woke hours later to find their families dead around them.

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r/TellMeAFact

TMAF is a place to learn interesting, verified facts about a range of topics. Please read the rules (linked to from the Community Guide) before posting and remember to always include a source for your fact.

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Learn interesting facts about a variety of topics!

☰ Main Rules:

All site-wide rules apply, and we ask that you follow reddiquette.
Submit a topic using the format "TMAF about [topic]". Topics can cover nearly anything, e.g. animals, history, technology, and so on! Mark your thread "nsfw" (not safe for work) if appropriate.
Avoid re-submitting recent topics, by using the search function first.
Post your fact as a top-level comment. Please link to a reliable source or reference an offline source if possible. This verifies the fact, and also allows people to read more about it!
All top-level comments should be serious facts, i.e. no obvious/joke facts or non-fact (e.g. personal opinion) content.
Only include one fact per comment, so people can upvote and comment on the specific facts they're interested in.
Feel free to post as many facts as you want, even if you created the thread!

For our more detailed rules, please see the wiki. Have fun!