From stink bombs to shirt buttons, Author Mary Roach studies “Humans at War”

Grunt: The Curious Science of Humans at War (BN.com)

New York Times Bestselling Author Mary Roach joins John to talk about Grunt: The Curious Science of Humans at War, a book about the details one wouldn’t otherwise pay much mind to, like the zippers on military uniforms. And the stink bombs merely meant to embarrass.