How Much Sun is Too Much?

Is Sunlight Dangerous? For the past 50 years, doctors say we should NEVER be in direct sunlight or risk skin cancer. As a child I basked all summer with no sunscreen. I got sunburns, peeled, and went out again. Basal cell spots taught me a lesson - but what's the lesson? Maybe it's not so simple and one-dimensional as "Sunburn causes Cancer". What if skin cancer is caused by SOMETHING ELSE or has SEVERAL CAUSES? And what's a good rule on SENSIBLE sun exposure? Surprising research ...