2 ms·
It's dark out for most of the day in some climates. In others, it's dark out for much of the year.
by jszymborski 3y ago
It's dark out for most of the day in some climates. In others, it's dark out for much of the year.
- goda90 3y agoNot just the darkness, but the necessary UV wavelengths literally can't reach you in the middle of that day without a cloud in the sky for some parts of the year at higher latitudes.