This story started out in a way that made me think it was going to be silly. The aliens in it were sort of whacked. But as it went on, it grew on me. In the end, it has a message and a grip.
The problem here is, I think the message is incorrect. Spoiler Alert: The story ends with aliens in the far future visiting the Moon, viewing Neil Armstrong's boot print. "This is where humans jumped off".
I think not. I watched the Moon landing in 1969. I took it for granted that we would be going into space, in numbers, in the near future. Instead we got the space shuttle. And with the troubles we have, and the troubles coming, I see no way we will be leaving this planet's gravity well in my lifetime. It is a truly sad state of affairs.
3 stars for the story.