Why do humans live as long as they do? Since whales have literally tons more cells than humans, why don't they develop cancers at much higher rates than humans? What can the genetic trade-offs we observe in other organisms teach us about increasing human longevity? Will we eventually be able to put people into some kind of stasis? What is the state of such technology? What counts as being dead? How much brain damage can a person sustain before they're no longer the same person? Is lowering te...