How to check if a fun fact is true (in 2 minutes)
Short answer: find a named, reputable source, search the claim together with the word "myth", and check that the numbers make sense. If you can't do any of the three, don't share it yet.
1. Look for a named source
"Scientists say" is not a source. A good fact points to an organization you can check: an encyclopedia, a space or weather agency, a museum, a university.
2. Search the claim with "myth"
Type the fact plus "myth" or "true?" into a search engine. Popular myths almost always have a debunking page near the top.
3. Check numbers, units and dates
Myths often round numbers dramatically ("100 times", "never", "always"). Real facts usually say "about" or "up to" and keep units clear. Old statistics may also be out of date.
4. Be extra careful with health claims
"Eating X cures Y" style facts are the most likely to be wrong. Check them with official health organizations before believing them.
5. Prefer facts that explain themselves
A true fact can usually tell you why in a sentence or two. If there's no explanation at all, be suspicious.
Skip the checking
Curiodex does this homework for you: every card has a short "Why it's true" and the source it's based on, and you can report any fact that looks wrong.
FAQ
What counts as a good source?
Encyclopedias, science agencies, museums, universities and peer-reviewed research. A blog or meme that only repeats the claim is not a source.
Why be extra careful with health facts?
They are the most often wrong or exaggerated, and believing them can affect real decisions. Check with official health organizations.
What if sources disagree?
Prefer the wording that is more careful ("about", "up to", "some studies") and the source closest to the original research.