Like nearly all science graduate students, chemistry blogger See Arr Oh was no stranger to stress. But one afternoon during his third year of a Ph.D. program in organic chemistry, as he sat in his car, he decided the stress might actually be killing him. "All of a sudden I would just be blurred out and tense all over. Everything just seemed to rush at me at once," he says. He went to the emergency room and was told he was suffering from panic attacks.