Today I Learned (TIL)

7457 readers
52 users here now

You learn something new every day; what did you learn today?

/c/til is a community for any true knowledge that you would like to share, regardless of topic or of source.

Share your knowledge and experience!

Rules

founded 3 years ago
MODERATORS
1
31
submitted 10 hours ago* (last edited 10 hours ago) by [email protected] to c/til
2
3
4
5
 
 

I found this advertisement placard in a vinyl album, and decided to play the card.

https://en.wikipedia.org/wiki/Daniel_Hale_Williams

Edit pictures of the card https://pixelfed.ca/p/bane_killgrind/821853386900164062

6
 
 

cross-posted from: https://lemmit.online/post/5748983

This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/Remiliera on 2025-04-26 11:15:07+00:00.

7
 
 

Scientists estimate that up to 70% of the sand on white sandy beaches in the Caribbean and Hawai‘i has been excreted by parrotfish. A large adult parrotfish can excrete over a ton of sand per year. Areas that have parrotfish produce more sand than similar areas with few or no parrotfish. This sediment production rate is especially important in areas like Hawai‘i, where there is little terrestrial input, and almost all of the sand is of biogenic origin.

https://manoa.hawaii.edu/exploringourfluidearth/physical/coastal-interactions/beaches-and-sand/weird-science-parrotfish-and-sand

8
 
 

The fourth floor is labeled 3A. The 14th floor is labeled 13A, etc. Four is considered bad luck.

9
177
submitted 1 month ago* (last edited 1 month ago) by [email protected] to c/til
 
 

The theorem has been expressed colloquially as "you can't comb a hairy ball flat without creating a cowlick" or "you can't comb the hair on a coconut".

10
54
submitted 1 month ago by Quilotoa to c/til
 
 

The sport, practised in Italy, used a wheel of maiorchino cheese and a course with a target at the end.

11
12
13
 
 

If I close one eye for a few minutes and then switch which eye is closed I see a very (very) subtle difference in hue.

Left eye sees a green tint; right eye sees a pink tint. It's more obvious when I'm looking at a white wall on a bright day.

I don't get this effect if I don't let one of my eyes adapt to the dark first.

14
17
TIL B.F. Skinner invented an air crib. (media.pluto.psy.uconn.edu)
submitted 1 month ago by Quilotoa to c/til
 
 

Psychologist B. F. Skinner create a "baby in a box" crib that was designed to make the mother's role easier. It would probably have prevented a lot of SIDS death, but because of its association with Skinner, it never caught on.

15
114
submitted 1 month ago by Quilotoa to c/til
 
 

Construction began in 2022. It plans to launch satellites.

16
 
 

Drop the pasta, start the playlist, when the music is over, you’ve got perfectly cooked pasta

17
51
submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/til
 
 

Between 1915 and 1926, Encephalitis Lethargica, or sleeping sickness, swept the world. It left people frozen—awake but unable to move or speak. Half a million died or became trapped in their bodies. Then, just as suddenly as it appeared, it vanished without explanation.

18
19
20
 
 

I mashed my keyboard and that Wikipedia article came up.

More links:

21
 
 

The video describes it as “dancing,” which I think is overly generous. But the little guy / gal is clearly experiencing happiness and celebrating.

22
23
 
 

24
25
 
 

cross-posted from: https://lemmit.online/post/4802929

TIL A restaurant in Long Beach, CA, was found to be serving Popeye's chicken and passing it off as their own. They would buy the chicken at Popeyes and upcharge for their own chicken and waffles d...

This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/Bluest_waters on 2024-12-31 23:25:54+00:00.

Original Title: TIL A restaurant in Long Beach, CA, was found to be serving Popeye's chicken and passing it off as their own. They would buy the chicken at Popeyes and upcharge for their own chicken and waffles dish. Once found out the owner refused to apologize.

view more: next ›