Alan Schwarz

In a hypercompetitive world, drugs like Adderall offer students, athletes, coders and others a way to do more -- faster and better. But at what cost?

Former football player and wrestler Chris Nowinski's quest to publicize recent findings about the often dire consequences of head concussions sustained by athletes in contact sports — injuries that have previously been considered momentary setbacks and ignored in the name of toughness and dedication to the team.