> All around us, and even inside us, tens of trillions of microbes are locked in endless battle. Bacteria, microscopic fungi, amoebas, tardigrades and other tiny critters have evolved weapons of mass destruction, such as toxins, biofilms and specialized enzymes, in order to wage war against one another.

> But despite all this action, humans have relatively little information on who is doing the fighting. There just hasn't been enough research into microbes to really inventory them. Estimates vary, but some research suggests there are literally millions of unknown microorganisms, encompassing multiple uncharted branches on the tree of life that is sometimes described as "microbial dark matter."

Interesting read