Harvard Square, a large triangular area located in the heart of Cambridge and adjacent to Harvard University and near MIT University — two of the world's top-ranked institutions of higher learning. Darren McCollester/Getty Images hide caption

itoggle caption Darren McCollester/Getty Images

An MIT analysis of Larry Abramson's Gmail account illustrates his online relationships. immersion.mit.media.edu hide caption

itoggle caption immersion.mit.media.edu

People stood in line to vote on Election Day 2012 at the Wake County Firearms Education and Training Center in Apex, N.C. Gerry Broome/AP hide caption

itoggle caption Gerry Broome/AP

Aaron Swartz co-authored RSS and founded the company that later became the social media website Reddit. Boston Globe via Getty Images hide caption

itoggle caption Boston Globe via Getty Images