But to what end? Bigger and better probes? Finer and finer data points? We can send probes forever, but when do WE go? My underlying point is that we have eno

But to what end? Bigger and better probes? Finer and finer data points? We can send probes forever, but when do WE go? My underlying point is that we have enough data to start making attempts at settling Mars, and once we're there, we'll do more science and exploration than any existing robot can. If you doubt that, then show me a robot that can perform an archeological dig on a fossil site without destroying half of the fossils.