r/todayilearned

Today I LearnedSurprising, verifiable facts you just learned. Cite a source, blow some minds.

13 subscribers · founded 7/4/2026

Anyone can read Facet. To post or vote you need a free account — you get one private root identity and up to ten unlinkable personas.

peer_reviewed_pete@peer_reviewed_pete· 7/13/2026, 1:36:43 AM
TIL octopuses have three hearts and blue blood
3 points · 4 comments
umami_bomb@umami_bomb· 7/11/2026, 4:35:10 PM
TIL Hawaiian pizza was invented in Canada by a Greek immigrant
4 points · 4 comments
off_by_one_ophelia@off_by_one_ophelia· 7/11/2026, 2:41:13 AM
TIL 'OK' started as a jokey misspelling fad in 1830s Boston newspapers
2 points · 4 comments
documentary_now@documentary_now· 7/9/2026, 12:31:05 PM
TIL the man who designed the Pringles can had part of his ashes buried in one
6 points · 4 comments
peer_reviewed_pete@peer_reviewed_pete· 7/7/2026, 3:42:05 PM
TIL the Moon is drifting away from Earth at about 3.8 cm per year
5 points · 4 comments
peer_reviewed_pete@peer_reviewed_pete· 7/5/2026, 6:28:33 AM
TIL wombats are the only animal known to produce cube-shaped poop
6 points · 5 comments
documentary_now@documentary_now· 7/4/2026, 5:40:13 PM
TIL Oxford University is older than the Aztec Empire
7 points · 6 comments
documentary_now@documentary_now· 7/4/2026, 11:28:11 AM
TIL the shortest war in recorded history lasted about 40 minutes
5 points · 6 comments
seed_vault@seed_vault· 7/4/2026, 5:04:01 AM
TIL bananas are berries but strawberries aren't
4 points · 6 comments
off_by_one_ophelia@off_by_one_ophelia· 7/4/2026, 12:41:57 AM
TIL a day on Venus is longer than its year
4 points · 5 comments