Today is the day of the Great American Eclipse. Those along its path of totality will (if the clouds permit) see an amazing sight that will never be forgotten by those watching. Your humble correspondent knows this because he was once lucky enough to view a total solar eclipse. The great thing about watching a total solar eclipse is that it absorbs all of your attention. One big reason is that it is indeed a miracle of nature. The moon is 400 times smaller than the sun but because it is also 400 times nearer to earth, both appear to be...