Imagine being alone so far away from all other humans? The sheer accomplishment is one issue, that's the scientist in them to look around in awe at the desolation, take samples, be investigators. However, that curious kid in them that always wanted to travel into space had to have taken hold of them as they explored. The wonderment of looking down at earth. The excitement of taking those steps. We can envy billionaires and playboys, but nothing anyone will ever do, they did. They were the first humans on the moon. One day when I'm gone, there will be the first colonizers and the first on mars etc. It all sprung out of the idea and then the reality that it CAN be done.