I find it amazing that there are at least ten times as many bacterial cells as there are human cells living in our bodies. Some of this microbiota perform tasks that are useful for the human host. However, the majority have no known beneficial or harmful effect.
The human organism is a marvelous cellular structure. In sheer numbers, each of us is host to around 100 trillion cells. The number is mind-boggling and looks like this: 100,000,000,000,000.
There is an incredible and harmonious give-and-take transpiring every second within each of us as trillions of organisms go about there lives mostly for the good of all, as well as for their host.
How is at that we humans, who number a paltry 7 billion or so organisms, find it to be so daunting to live together in peace and prosperity on the outside?