With a stereoscopic microscope, I examined the dust I collected with a broom on the floor of my dining room. I observed grains of sand that were likely tracked into the home by shoes. There where cat hairs ( I have a cat), human hairs, textile fibers, bread crumbs and a mass of other material of unknown origin. In general, the particles were heavy and large enough to be observed under low a magnification instrument like a binocular microscope.