Normally, insomnia happens before a major event. Kids can't sleep before Christmas, I can't sleep before International Women's Day you get the idea. But unbridled anticipation doesn't explain why anyone would havetrouble sleeping after the eclipseon Monday. Honestly, you'd think that after all the excitement of watching the moon blot out the sun, sleep would come sometime between flopping onto your bed and closing your eyes. Judging from how many people complained of insomnia on Monday night, though, it isn't that easy. So what gives?