In September 2026, Google Research completed the first full connectome of a fruit fly brain — 3,016 neurons, 55 million synaptic connections, and a decade of collaborative effort distilled into a single, unprecedented map. The fruit fly was chosen not for its smallness but for what its smallness reveals: organizational principles that appear to echo across the animal kingdom, including in the 86 billion neurons of the human brain. This is not merely a scientific milestone; it is the moment neuroscience gained its first complete wiring diagram of a mind, however modest, and with it a new kind o