"Trekkies" (Star Trek addicts) may disagree, but for most earth-bound beings the oceans are the "final frontier." Only a tiny percentage of those have ever been mapped. A close second would be Alaska.

Perhaps, then, it's fitting that Alaska is the second to last quarter coin to be issued in the 50 State Quarter series (Hawaii will finish it out). Begun 10 years ago, the quarters have become one of the most collected items in U.S. Mint history. Government estimates r ...

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