Fermentation technology as a driver of human brain expansion - Communications Biology
www.nature.com
As brain tissue is metabolically expensive, the evolutionary expansion of human brains required shifts in energy intake and metabolism. The External Fermentation Hypothesis proposes that a shift to consumption of externally fermented foods in human ancestors permitted a reduction in gut tissue required for internal fermentation, facilitating brain expansion.

Here, we propose the initial metabolic trigger of hominid brain expansion was the consumption of externally fermented foods. We define “external fermentation” as occurring outside the body, as opposed to the internal fermentation in the gut. External fermentation could increase the bioavailability of macro- and micronutrients while reducing digestive energy expenditure and is supported by the relative reduction of the human colon.

    • MwalimuOP
      3·
      1 year ago

      Having never watched Futurama, I am floating here.

  • Jim East@slrpnk.netEnglish
    1·
    3 months ago

    Interesting hypothesis, but it seems very unlikely. Safely fermenting any calorie-dense plant matter in the tropics without airtight containers or other equipment would be more a matter of luck than anything. It would not be a reliable means of increasing caloric intake for an entire population. A much simpler explanation for human brain expansion? Sweet fruit. No tools, no fire, no difficult digestion. Neuroscientist Tony Wright has researched this possibility extensively.