Today's Takeaways: Battered Brains, Digging Up Dirt, Secret Genius Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Battered Brains Raise New Questions for Football Safety Advocates Your Skeletons Are Showing: How Opposition Researchers Find Dirt on Politicians With O'Malley Gone, Hillary and Bernie to Spar One-on-One in New Hampshire The Iran Hostage Crisis & The NFL: The Super Bowl Story You've Probably Never Heard Of H. Joseph Gerber: The Innovative Genius You've Never Heard Of New Military Plan Will Allow Troops to Freeze Sperm and Eggs "Opposition researchers" are the people responsible for digging up dirt on elected officials and candidates seeking office. ( Oivind Hovland / Getty ) Produced by PRI and WNYC