ATLANTA — As summer temperatures rise, it's important to understand how your body works to keep you cool. Your body has a built-in air conditioning unit: sweat. The normal body temperature is 98.6 ...

We've all felt it: At first comes the trickle, and then the flood. It's embarrassed us, and even torpedoed a presidential campaign. But when was the last time you were grateful for … sweat? Many are ...