Rat Brain Reconstructed in a Computer

Scientists have digitally recreated a slice of a juvenile rat's brain — including 31,000 brain cells, of 207 different types, with 37 million connections. The computer-simulated brain achievement is part of the Blue Brain Project, whose aim is to create a rat brain and, eventually, a human brain inside a computer. The team first conducted tens of thousands of experiments in live juvenile rats, painstakingly cataloging the types of neurons and synapses, or brain cell connections.