Although, unless you have a fistulated cow with a big hole in its side, and you can put your hand into its rumen, it's hard to imagine that the delivery of microbes directly into the mouth and through the entire top of the digestive tract is the best delivery system, so you may have heard in people they are now doing fecal transplants, where rather than delivering a couple of probiotic microbes through the mouth, they are delivering a community of probiotics, a community of microbes from a healthy donor, through the other end.

Now what these transplants, these fecal transplants, or the poo tea suggest to me, and many other people have come up with this same idea, is that the microbial community in and on us, it's an organ.

The data comes from the field, from baboons not chimpanzees in this case, where they did fecal samples on the baboons and they analyzed them for glucocorticoids.

And dolphins are very promiscuous, and so we have to determine who the fathers are, so we do paternity tests by collecting fecal material out of the water and extracting DNA.

Well, it now turns out that the whales are crucial to sustaining that entire ecosystem, and one of the reasons for this is that they often feed at depth and then they come up to the surface and produce what biologists politely call large fecal plumes, huge explosions of poop right across the surface waters, up in the photic zone, where there's enough light to allow photosynthesis to take place, and those great plumes of fertilizer stimulate the growth of phytoplankton, the plant plankton at the bottom of the food chain, which stimulate the growth of zooplankton, which feed the fish and the krill and all the rest of it.

He'll run back into his house, and he will contaminate his drinking water and his food and his environment with whatever diseases he may be carrying by fecal particles that are on his fingers and feet.

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