UV rays

We've all heard someone say they got "sun poisoning." But is that actually a real medical condition—or just a really bad sunburn?
Summer is here—and so is the flood of parenting advice. But how much of it is actually true?
With daylight a little less plentiful each day in the Northern Hemisphere until the Winter Solstice arrives, some sun worshippers are scrambling to maintain their precious, but fading, tans.
Have you ever heard someone (OK, your mom) say, "Don't sit too close to the TV, you'll hurt your eyes!" or "Don't read in the dark, you'll strain your eyes!" and "Eating carrots will improve your vision!"  Are