premise: Based on a review of the trajectory charts in The Physics of Baseball and Keep Your Eye on the  The Science and Folklore of Baseball , conversations with University of Puget Sound physicist Andrew Rex, and correspondence with aerospace engineer and baseball researcher Roger Hawks, I determined that the McGwire home run would have traveled about 474 feet.
hypothesis: I have been able to calculate the distance travel of the McGwire home run, which is definitely impressive for everyone that knows it.