Many trees grow from a common root system underground, are one being reaching up in many bodies—birch, ash, mangrove. Oak trees wrap their roots around each other under the earth. Mycelium, the threading that makes up most mushrooms, communicates between trees, particularly about toxic growth,59 a process called mycorrhiza. Most animals, including humans, sustain parasites and bacteria along and within our bodies, some of which manage waste and keep us well.
