I saw where trapper and Corinth were going at it on the topic of sunlight and its effects on the DNA, etc. but chose to not butt in. Now that you've raised the issue of connective tissue, some might want to consider that the damage to DNA does in fact occur, but there are two kinds of people - 1) those who have enough essential building blocks in their systems for rebuilding the tissue and 2) those who are deficient in these building blocks. According to Dr. Rath and the late Dr. Pauling, these are: ascorbate, lysine, and proline. The body can make its own proline, but not so for the ascorbate and the lysine. When hit by sunlight, a person who's connective tissues are harmed can recover quicker and more fully than the person who is deficient in ascorbate and lysine. It could be that long-term sunlight exposure by those who are deficient in these building blocks is what leads such folk to experience negative aftermaths , e.g., melanomas,etc.