What actually happens in a baby’s brain the moment it first decodes print—and how the same circuits later let adults scan paragraphs at lightning speed? In this episode we follow the exact developmental timeline: from the physics of photons striking the retina, through statistical pattern detection in the visual word form area, the measurable neural “click” (N170 tuning + N400 drop), spontaneous early readers and math learners, and finally the predictive eye-movement strategies of fluent skimmers. Drawing only on longitudinal fMRI, ERP, eye-tracking, and synaptic plasticity studies, we examine every stage with the data—no hype, no shortcuts. We also clarify why baby-sign communication gains are driven by parent attention, not the signs themselves. A precise, chronological map of how the human brain turns light into language.