Grunt: The Curious Science of Humans at WarGrunt tackles the science behind some of a soldier's most challenging adversaries panic, exhaustion, heat, noise and introduces us to the scientists who seek to conquer them. Mary Roach dodges hostile fire with the U. S. Marine Corps Paintball Team as part of a study on hearing loss and survivability in combat. She visits the fashion design studio of U. S. Army Natick Labs and learns why a zipper is a problem for a sniper. She visits a repurposed