When Pittsburgh Steelers safety Troy Polamalu suffered concussion-like symptoms in a recent NFL game, he did what any decent husband might do: He walked to the sideline and called his wife Theodora to tell her he was fine. Polamalu, like so many football players, has a long history of concussions,…

In September 1787, the Constitution was submitted to the states for ratification. The Pennsylvania Assembly met to pass legislation creating a convention that would decide if the state should sign on to the newly reconceived United States. But something was missing: a quorum. Several…