Kalyn Heffernan is 24 years old, weighs 53 pounds, and measures three feet, six inches tall. She's light enough to carry, compact enough to hide under a winter coat, and is sometimes mistaken for a child. But Kalyn, who has the brittle-bone disability osteogenesis imperfecta, is hardly innocent, precious, or inconspicuous: The Colorado native dabbles in graffiti, cusses gloriously, and has a septum piercing. She raps, scribbles rhymes, and... More >>>