Lumisal

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Regarding sleep quality, why did humans evolve to require full darkness?

I know evolution is governed by chance and it is random but does it make sense to "ruin" sleep if there's light? I mean normally, outside, you never have pure darkness, there are the moon and stars even at night. In certain zones of the Earth we also have long periods of no sunshine and long periods of only sunshine....

Lumisal ,

Does this mean humans in far north climates have different methods of determinating sleep times? Because I'm originally from close to the equator and I'm the summer I'll be awake until near midnight when at least we get some dusk, but the nightless days really screw me up

Lumisal ,

I was wondering why it was so dark.

I used to live in. Jyväskylä. But the pictures and context you gave seem to be Uusimaa region.

I'm guessing the second one is dusk, assuming your camera didn't flip the image. Sun goes in a circle here.

The rolling blackout curtain from Ikea is what helps me a lot (I think the "fyture" one?)

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