We always love spending time with my sister and her husband in Philadelphia and this past weekend was no exception, especially considering the fact that we spent time at a keeper of many of my childhood memories, the Franklin Institute.  Ever since I was a young girl,I can recall looking over the handrail of the marble stairwell to look at the Foucault pendulum going back and forth (pictured on left).  The pendulum is the centerpiece of this impressive museum but it only begins to scrape the surface of what the museum has to offer.  My brother-in-law … [Read more...]