Comment Given that countless other human endeavors ... (Score 2) 61
... are way more stupid and/or pointless and more expensive I'd say exploring space should be one of our global scientific priorities. Perhaps even more so than yet another collider for even smaller sub-atoms or yet another Tokamak that goes nowhere. I'd perhaps even make that a new sort of quasi-religion, since the benefits from work on this is likely only to pay out when todays generations are no more.
As for saving this planet and keeping it livable for humans: We can do both and then thousands of other things on top of that at the same time. And we should absolutely do all that while we still have an advanced scientific high culture.