We live in a world of networks, write University of Pennsylvania physicist and MacArthur Fellow Danielle S. Bassett and Max Bertolero of Bassett's Complex Systems Group in this issue. Consider the interstate highway system, the World Wide Web, the power grid, to name just a few. Our inner world is also networked—specifically, in the brain. In their article, “How Matter Becomes Mind,” the authors describe how “what the brain is—and thus who we are as conscious beings—is, in fact, defined by a sprawling network of 100 billion neurons with at least 100 trillion connecting points, or synapses.”