TED: Mina Bissell: Experiments that point to a new understanding of cancer - Mina Bissell (2012)

Summary: For decades, researcher Mina Bissell pursued a revolutionary idea -- that a cancer cell doesn't automatically become a tumor, but rather, depends on surrounding cells (its microenvironment) for cues on how to develop. She shares the two key experiments that proved the prevailing wisdom about cancer growth was wrong.