Description: It can be so frustrating to put great effort into something, and then to have your work and achievements called into question. I can't begin to imagine how frustrated Samuel Pierpont Langley was in 1903. By that time, he had spent over forty years studying astrophysics and aerodynamics. His work on astronomically-derived time measurement in the late 1860's is the heart of the
Description: [caption id="attachment_7327" align="aligncenter" width="432" caption="The Smithsonian Institution Building, "The Castle""][/caption] When I'm walking around the National Mall, I often hear people exclaim, "There's the Smithsonian!" as they point to the large red Smithsonian Castle near the Metro exit; something I also would have assumed before my first visit to the Mall.