At his blog, Paul Knoepfler says that he sometimes lets himself dream big as a scientist. "The truth is that having a big-time, perhaps way 'out there' goal or even dream is important for both scientists and Science," he writes at the appropriately named blog, Confessions of a Stem Cell Scientist. Knoepfler notes that while those dreams may not come true tomorrow, but that those ideas serve as a starting point to get to that tomorrow.