> I fail to understand how going to Mars is sensible. It isn't. It's a relic of intuitions born in our ancestral environment when exploration tended to be pro

> I fail to understand how going to Mars is sensible. It isn't. It's a relic of intuitions born in our ancestral environment when exploration tended to be profitable. But that's because our ancestral explorations all took place in the relatively benign environment of earth. It's barely realistic to do a sample return mission to Mars. Sending humans there is a pipe dream.