The Blue Brain Project aims to recreate the human brain at the cellular level through detailed computer simulation. It involves scanning actual brain tissue to collect data on neurons and synapses, which is used to build biologically realistic models. These models are then simulated on supercomputers. The goal is to better understand the brain and enable faster treatment development for brain diseases. Key aspects include using nanobots to non-invasively map entire brains, and eventually creating a simulated rat brain with over 20 million neurons by 2014 and a simulated human brain with over 80 billion neurons by 2023.