The human brain contains approximately 86 billion neurons, and 100 trillion connections between those neurons. Despite our inability to image each neuron and determine their exact connective patterns, several approaches for noninvasive imaging of the living brain have been developed and utilized to great benefit. LLNL scientist Alan Kaplan explores the immense landscape of the human brain and quantifies the brain in terms of data flow. Then describes engineering applications of recorded electrophysiological data and explores methods for analyzing such data to determine the pattern of signals that arise during various activities and mood states. Series: "Field Trip at the Lab: Science on Saturday" [Science] [Show ID: 34465]