A recent post by our very own BL1Y reminded me of a thread I've been meaning to do for a while. Over the years, many of the great questions of history have been answered. For others, while we may not have an exact answer, we have some satisfying plausible hypotheses. Every few years, one of the great longstanding mysteries gets revealed, and a number of History Channel specials have to be shelved. For example, we today know the identities of Deep Throat, BTK, and the Unabomber. Thanks to genetic testing, we know that Tsar Nicolas' family, including the Grand Duchess Anastasia, did not escape. However, there are still many mysteries left unsolved. Some may never be solved. I just hope to live long enough to find out who is "so vain." FOCUS: Which unsolved historical mystery bothers you the most? Which one would you most like the solution to?