Words like "natural" can be tricky. Dying when struck by a bus is natural. That doesn't mean that busses are a natural feature of the world, or that you shouldn

Words like "natural" can be tricky. Dying when struck by a bus is natural. That doesn't mean that busses are a natural feature of the world, or that you shouldn't look before crossing, or that an ER shouldn't make an effort to save the bus-stricken. What do you make of the fact that connecting aged organs to young mice restores the organs? I think we should pursue drugs and treatments that improve function in aged populations, do you? Maybe ageing bodies just need to be occasionally cleaned out to restore healthy function. Maybe it is "natural" to die, but unnecessary to suffer collapse along the way? Worst-case we have to compete in our careers and marathons with then healthy elderly and endure that same happy fate ourselves.