Although we don’t generally think about it, it’s fair to say that, somewhere in the back of our minds, we all know that there are lots of microscopic organisms running around that we’d just as soon (and do) forget about. Well, it turns out, not only do we have lots, we have more than anyone imagined. In the first ever census of arthropods (bugs) in American homes, a team of etymologists found that homes carried between 32 and 211 different species! Thankfully, most of them are either harmless, or even helpful. But, don’t go looking at your carpeting under a microscope.