“As a scientist, I know that predicting outcomes is based as much on probability as on cause and effect. It isn’t always possible to isolate the one factor that led to a particular result. Still, as I stepped forward to receive my award, I couldn’t help rethinking, however briefly, my journey backward through time, from an NFL event in Maui, through two missions on the space station, to a football field at Heritage High. It had all begun with a dropped pass. In”