3 ms·
Um, we've left the earth already. The only reason why we don't continue to do so is that it isn't cost-effective -- which means that we have another resource-al
by jeffreymcmanus 15y ago
Um, we've left the earth already. The only reason why we don't continue to do so is that it isn't cost-effective -- which means that we have another resource-allocation problem rather than some mysterious insurmountable challenge.