Neuroscience has been engulfed by a technological arms race. The aim: to record every bit of activity from every single neuron in the brain of a simple animal. To the victor, prizes will be awarded, honours bestowed - a place in history assured. Then we theorists will turn up and spoil the party: "Great! So, um, what did we learn from that?" Without models of how the brain works, we argue, data is useless. The model asks the question, the data gives the answer. In this session, Dr Humphries will take a whirlwind tour of the cutting edge of neuroscience; unravel the necessity of models; and explain why James Black called them "accurate descriptions of our pathetic thinking".