Rhaina Cohen

Rhaina is a production assistant for Hidden Brain. She got her start in public radio as an intern for Planet Money. Before entering the audio world, Rhaina worked in television news and on book projects. She was part of the production team for the ABC News show, This Week with George Stephanopoulos. She worked as a research assistant for Rebecca Traister on the New York Times bestselling book, All The Single Ladies: Unmarried Women and the Rise of an Independent Nation and for Peter Slevin on his biography of the former first lady, Michelle Obama: A Life.

As a Marshall Scholar, Rhaina received a master's in Comparative Social Policy from Oxford (and while there, competed in a dance style that hasn't yet gained ground in the U.S., Acrobatic Rock 'n Roll). She holds a bachelor's degree in American Studies from Northwestern University. Through her undergraduate and graduate research, Rhaina studied family policies in Denmark, Iceland and the U.S. military.

Women in the Middle Ages were excluded from many realms: the law,

We take it for granted that nostalgia is an ordinary, harmless emotion. You won't get a referral for a psychologist because you've posted a childhood photo with the caption #ThrowbackThursday, or because you have a weak spot for Lucky Charms or Fruit Roll-Ups. But that's a relatively new way of thinking.

The scientist who coined the term "nostalgia" in 1688 thought of this emotion as a neurological illness caused by demons. Other scientists latched onto this conception of nostalgia as a disease. It took marketers, centuries later, to realize that nostalgia has benefits.

Olutosin Oduwole was in his dorm room at Southern Illinois University when police knocked on his door one day in 2007. They were there to arrest him.

"In my mind I'm thinking, 'Okay, maybe a warrant for a ticket.' I really didn't know what was going on," he says.

What was going on was that the police suspected that Olutosin, a college student and aspiring rapper, was on the brink of committing a Virginia Tech-style mass shooting on his campus. He was soon charged with attempting to make a terrorist threat, and was eventually convicted and sent to prison.