In a convergence of biology and computation, Google researchers have completed the first full wiring diagram of an entire nervous system — a fruit fly brain holding roughly 3,000 neurons and over 100,000 synaptic connections — and demonstrated that this living architecture, translated into digital form, can navigate virtual worlds in real time. The achievement, years in the making, represents humanity's first complete answer to a question as old as neuroscience itself: what does a mind look like, in full? That the mapped brain now steers characters through Doom and Beat Saber is not a stunt bu