Skin cancer is sneaky, and not  because it doesn't give fair warning. An early -- and curable -- cancer  can usually be spotted, but often you never see it (it's hiding on the  back of your upper thigh), or you dismiss it as just another freckle.  Sure, you've heard the "changing color, ragged edges" litany many times,  but do you know 
exactly what that looks like on your own skin?
Time  for some show-and-tell. Now -- when you're still wearing your shorts  and flip-flops and showing more skin than usual -- is the perfect time  to see whether you can spot skin cancer