It's summertime and you know what that means--sun, sun, sun! There's some vibrant chemistry that happens between your skin and the sun rays. Out in the open air on a beautiful summer day, most people don’t realize that they’re bathing in the world's most common carcinogen – the sun's rays. Ultra violet (UV) rays to be exact. Let’s take a look at how UV rays affect your body, and the sorts of built-in chemical defense systems you're working with to stop any potential damage. | Reactions