We've long known that the human body is home to all kinds of bacteria, fungi, and other microbes, and now scientists have completed the first ever map of all of these semi-disgusting critters. It was not an easy job, but now the census of the human microbiome is complete and the verdict is that we're disgusting—but don't worry, we're disgusting in a good way.

The bad news is that we have about 10 bacterial cells for every one of our own cells, and various microbes make about about one to three percent of our body mass. That could mean that some of us are carrying six or so pounds of bacteria around with us. But before you go on some crazy diet (aka overdose on antibiotics) to shed that microbial weight, you should know that most of the bugs we play host to actually do quite a lot to help us. They've all got specific jobs. For instance, gut bacteria helps us digest certain proteins and fats.