At age 13, after losing a family friend to pancreatic cancer, Jack Andraka set out to discover why the available tests couldn’t detect the disease earlier and at a lower cost. Amazingly, he stumbled upon a way to do just that – he estimates his method is 168 times faster, 26,000 times cheaper and over 400 times more sensitive than the tests available at the time. He tells his story in this TED talk.