Age: 15

Studies show that pancreatic cancer is the fourth most deadly cancer in the U.S. That could possible change thanks to the groundbreaking strides made in the medical field by this Maryland high schooler. After being told by numerous scientists his method would never work, Andraka defied the odds by creating a dip-stick sensor that detects pancreatic cancer at its earliest stage with a 90 percent accuracy rate. #LifeChanger.