Hacker News Reader

> Our clocks don't work that well with more than about a 14-15 hour photoperiod ("day")

Regarding only natural light, what would be the ideal latitude region for psychology year-round?

At 30°N and 30°S days swing between 10 hours to 14 hours through a year. Would it be ideal to live in between 30°N and 30°S, or would you expand/shrink the range?

ps. Any resources on geography-psychology relationships would be appreciated.

View on HN

SAD and cancer rates go up somewhat with latitude, definitely by 35-40N. But it is complicated because it doesn't affect everyone the same way. e.g., most of Europe is living above 40N.

In some cases, availability of natural light (due to tree cover, weather, and position in timezone) is as important as latitude.

I would guess that some people are simply better at living at more extreme latitudes or with a weaker circadian signal. Several researchers have tried to use particular genetic markers to explain this, but I don't know a specific one that explains all of it.

Reply on news.ycombinator.com