Julie Rehmeyer felt like she was going to die. She'd spent years battling a mysterious illness so extreme that she often couldn't turn over in her bed. The top specialists in the world were powerless to help, and research on her disease, chronic fatigue syndrome, was at a near standstill. Having exhausted the plausible ideas, Julie turned to an implausible one. Going against both her instincts and her training as a science journalist and mathematician,...