The «PM» stands for «particulate matter,» and the «2.5» stands for 2.5 microns in diameter or smaller — roughly the size of a single bacterium. (businessinsider.com)
There isn't a single fossil record showing this and on top of that, literally billions of bacterial generations have been witnessed and there hasn't been a single bacteria to become a multi-celled organism. (religion.blogs.cnn.com)
This being would be so different from us, that if you put a human next to, say, a single bacterium, that being would look at both and see essentially the same thing. (religion.blogs.cnn.com)