Guess Pains

I got dumped four months ago, and I'm still not sure what happened. All of my boyfriend's explanations seemed vague, and the breakup really came out of nowhere. I don't want to contact him. How do I sort this out so I can move on?

--Desperately Seeking Closure

Science has yet to figure out a number of life's mysteries -- questions like: "What came before the big bang?" "Why is there more matter than antimatter?" and "If we're such an advanced civilization, what's with short-sleeved leather ja...