Let there be light!

[annie]

Excessive sun exposure is bad for our health. But sun deprivation is also harmful - contributing to ailments from depression to disturbed sleep, obesity and even cancer.

People inhabiting the far northern hemisphere are particularly vulnerable, forced to endure long, dark winter nights and sometimes only seeing the sun for three quarters of an hour per day in December.
http://www.bbc.co.uk/news/health-31297302

[wendy]

it would be most interesting to see how long people usually lived in the 'dark' countries.

[maureenho]

I would not survive with that little amount of sun light.

[JaneJ]

I think I am solar powered. I always feel better when I have been out in the sun