Our 80 billion neurons form an estimated 100 trillion connections. Through those links surge the signals that make thought possible. Sebastian Seung of MIT has been calling for a full-blown atlas of those connections, because he believes it will help us understand how the brain works and how the brain makes us who we are. In the April issue of Discover, I pay a visit to Seung’s lab to see what he’s up to, and what he hopes for the future. Check it out.

I couldn’t be happier that this column is available a couple weeks before Seung will participate in a public debate about the connectome on April 2, hosted by myself and Robert Krulwich of Radiolab. The