In the article, it mentions that the different microbes affect the level of brain derived neurotrophic factor (usually known simply as BDNF in the bizz). BDNF is well known to promote learning and memory, as well as brain plasticity (the brain's ability to change, adapt and recover from injury). So while this is speculative, I would imagine it's not a great leap to suggest that microbial content could on some level influence how well students learn.I've read a few articles on how antibiotics have negatively affected the microbial populations in the American gut and the rise of allergies and other things that may be related to microbes, but in light of this article, do you think that there might be a possible link between microbes and how American students learn?