Many colleges ask beloved professors to give their version of a "last lecture"-what they'd say if they were summing up a lifetime of learning and teaching. But at Carnegie Mellon University on September 18, 2007, Randy Pausch gave a last lecture unlike any other. A year earlier, he had been diagnosed with pancreatic cancer, a deadly, fast-moving disease. And just weeks before the lecture, he'd learned that cancer had attacked his liver and spleen. The prognosis: Randy Pausch had less than six months to live.