Scientists are only just wrapping their heads around the long-term effects of concussions and their findings could change the game of football as we know it. This explainer breaks down the history of the concussion crisis in the NFL.
Credits: Written by Adam Doster.
Designed by Tabriz Ghazi and Katie Tonkovich.
Images courtesy of the Associated Press, Xenith, Poc.
First Published: 10/20/2014