WT: Blood Letting Is Back!

The episode opens with a long discussion about the human microbiome and the idea that bacteria in the gut, mouth, and skin are integral to human health. The hosts then focus on fecal transplants and related research, including mouse studies suggesting younger donor material may reduce inflammation and improve health, while older material can have negative effects; they also briefly connect this to blood donation and the possibility that regular donation may trigger the body to replenish blood in a way that offers some rejuvenation-related benefit. A large portion of the episode is devoted to speed reading and reading-comprehension experiments. Andrew Mayne describes RSVP/Spritz-style one-word presentation, then argues that chunking words into phrases or clauses may work better, citing an older study and his own experimentation. The conversation broadens into accessibility, captions, emoji, text-to-speech, and other ways of adding context, and the episode concludes with picks including the movie Everything Everywhere All at Once, the US Chemical Safety Board YouTube channel, and Brian's choice to step back from fiction and listen to nonfiction for a while. Key topics Human microbiome and the idea that we are symbiotic organisms: The hosts discuss gut biota, bacteria in the mouth and on the skin, and joke that humans are partly made up of resident microbes. They connect bacteria to digestion, immune function, and possibly mood. The science and stigma of fecal matter transplants