I am a fan of the sun. I love its ability to warm me when I'm cold, to trigger vitamin D production in my skin, and to boost my mood. As a kid growing up in Iowa, I spent long afternoons mowing lawns, hiking around the nearby woods, and lying in the backyard trying to get the perfect tan. Most of this did not involve sunscreen. Ok, maybe some baby oil or Coppertone SPF4, but nothing really protective. As an adult, I have always enjoyed a little bit of a tan, but I've been more careful. I limit my time in the direct sun and wear a hat every time I go out for a long hike or run. Sunscreen is part of my daily routine. Unfortunately, it all caught up to me this year. I go to the dermatologist every year, and every year she burns off a spot or two that she refers to as my "barnacles," otherwise known as actinic keratoses. This year, however, she decided to take a couple of biopsies. They were basal cell carcinomas, requiring Mohs sk...