Are you a night person or a morning person? I used to be a night owl but years of getting up early have destroyed that--which is what my parents said would happen--and nowadays I have trouble staying up past 10. This is a good thing, apparently, because being a night owl can up your chances of cancer. Why? Perhaps it's the lifestyle choices of night owls, who tend to be heavier, less active and without children. Or perhaps it an increased exposure to artificial light -- these days, we can avoid sunlight altogether, something that wasn't possible 100 years ago.
What do you think?
