[strictnein]

> When it comes to slumber, what matters most is how rich you are.

Looking at their sleep map, that swath of good sleep down the middle of the country seems to go against that, and isn't mentioned in the article (unless I missed it). Most of Minnesota, Nebraska, Iowa, and Colorado aren't "rich", but they get the best sleep. Wisconsin is slightly worse than those, but still rather good, and likely the only reason they're not great is that it's the state with the highest alcohol consumption.

[Izkata]

Even more interesting is how the swaths are angled across the whole country, at just about the same angle as when sunrise actually is: https://freethoughtblogs.com/singham/2022/03/18/sunrise-time...

[cootsnuck]

I immediately thought temperature and humidity.

But of course correlation yada yada causation.

[Perceval]

The "worst sleep" map is just two demographics: African Americans and Appalachians.

https://www.ruralhealthinfo.org/charts/22

https://artsandsciences.sc.edu/appalachianenglish/node/783