A teaspoon of healthy soil contains more microbes than there are humans on this planet. (treehugger.com)
So while there are more microbes left to find, they may fill up known branches of the tree of life rather than starting new ones. (newscientist.com)
«There are likely many more microbes living in carbonate mounds than in sediments, their contributions to methane removal from the environment may be more significant.» (techtimes.com)