Dr. Mark Davis was enjoying a successful career as a chemical engineer, until his wife was diagnosed with breast cancer. Now, ten years later, he’s created a revolutionary nanoparticle drug that has reversed terminal cancer in one test patient. This story is featured in "Curious," a series co-produced by Thirteen/WNET. Dr. Davis is joined by series producer Mark Mannucci and Ray Natha, the cancer patient featured in the story.