It's called science, and the desire of man/humanity to learn, gain knowledge, and go where none has gone before. We found out the Moon was not made of cheese and we found out much more in the progress. We have stopped going to the Moon due to situations of politics and economics, but they simply create an hiatus. You can't stop progress, and that seems to be what some people here are trying to do, for a reason that I'm yet to fathom. We will go back to the Moon: We will put man on Mars: We will do all the other hard things: All in time, and all when the situation and technology allows that we can do it safely. And in the meantime, we also will try and improve the lot for those on Earth less fortunate than the rest of us, and space exploration and science will be an instrument for doing that.