The Foucault pendulum

Today, we went for quite a long walk -- through the Luxembourg gardens, the Pantheon and the surrounding neighborhoods.  (Hopefully, more on that later.  I did, of course, take plenty of pictures.  AMAZING and inspiring design.)

But for now, a treasure of the Pantheon in Paris that I found particularly intriguing.  The Pantheon houses a Foucault pendulum.  Essentially, it was created by French physicist Leon Foucault as an experiment to demonstrate the rotation of the Earth.  It looks as though the pendulum moves and changes positions around a circle as it swings, but in fact, it is the Earth that is actually moving.  I thought I'd share this video that I took: