The Fight Over Sunlight

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The sun has always been a hot topic. For centuries, we’ve flip-flopped over whether our health depends on soaking up its rays—or shielding ourselves from them. The current conventional wisdom is clear: Avoid sunburns at all costs, using shade, hats, long sleeves, and the highest SPF sunscreen your drugstore has to offer. But in a historical sense, that advice is pretty new. Not long ago, doctors told parents to slather babies in oil and let them roast in the afternoon sun. Tanning was once medically prescribed. Though we’ve lived under it for all of human history, we’ve never quite figured out how much sun is actually good for us. So where has the pendulum landed today? And why does it keep…