With these microbial systems in the Pilbara, you can see these things in the field and under the microscope.
My research forced me to look at human societies from a microbial point of view, and they looked remarkably fragile.
Particular scientific interest has been focused on bacterial (and other microbial) diversity in our intestines.
microbe mi·crobe (mī'krōb')
A microorganism, especially a bacterium that causes disease; a minute life form. No longer in technical use.
A microorganism, especially a bacterium that causes disease. See Note at germ.