Very interesting. The idea of human a human superorganism as a host to a variety of specialized and essential symbiotic bacteria should appeal to the Unixers in the audience.

The following quote is unrelated, but talk about counter-intuitive:

"This bacterium, which causes life-threatening distension of the gut in some people who have been treated with antibiotics and thus had their microbiomes disrupted, is a bane of hospitals. It kills 14,000 people a year in America alone. But recent experiments have shown it can be eliminated by introducing, as an enema, the faeces of a healthy individual."