Heribert Watzke, the scientist credited with establishing the field of food material research, wants to remind people that our guts are more than just plumbing. In twenty minutes at MAD3, Watzke analyzes the constant, dynamic dialogue that takes place between our two brains: the big brain, in our head, which uses up 25 per cent of our energy and accounts for only 2 per cent of our body mass, and the one below, in our gut.
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