Wouldn't there be ruins to the old way of life? It does seem a bit odd how people shrunk but there was no technology to grow them back. And a trip to the moon is mentioned so that means there are humans not present on Earth who would not have been affected by the shrinking.I think they should have been important to the story and the development of humanity. I think I'm being very pedantic. It's a good story obviously, but I feel as if I have to mention these things.