[Dewie]

- Unprotected exposure to sunlight also prematurely ages ones skin and increases the risk of skin cancer. I'm curious if there is some unique property with sunlight that makes you smarter, or if it is just the fact that you get D vitamins from sun exposure. If it is the latter, I can get D vitamins from my diet instead.

Personally I've lived 61 degrees north for most of my life and I don't think SAD has been a problem for me.

- I've suspected and read from others that all the fuzz about classical music is mostly the result of some kind of high culture bias - I have a hard time believing that people have studied the effects of classical music to the same extent as something like rock or techno. I wouldn't be surprised if studies show that listening to your favourite music has overall more benefits compared to listening to classical music whether you like it or not.

[freyr]

The cited scientific study was actually performed on nocturnal animals (rats), and the scientists found that long exposure to light caused the rats stress:

"...the brain of nocturnal rats generates a stress response to a long-day photoperiod, contributing to depression..."

Somebody must have extrapolated from this result that, since humans are diurnal, long periods of darkness would cause us stress and depression.

There is no direct mention of Vitamin K (or for that matter, any healthful benefits of the sun) in the cited study.

[lnanek2]

There have been studies about songs with vocals vs. songs without vs. white noise while working. I guess it is pretty obvious in hindsight, but vocals just distract you, so white noise works best, followed by something without like classical, and then finally other music.