The Northeastern University campus has changed dramatically changed since 1971, becoming larger, greener and more welcoming. If all you recall are trolley tracks, endless acres of blacktop parking lots and rectangular buildings of gray brick, and you haven’t been back to the campus since your Commencement Day, you probably would be surprised by many changes. A familiar view of the entrance to Ell Hall, but with a prettier garden to soften the gray brick A returning visitor first would notice how much cleaner the buildings they remember are now. This is partly due to...