The Gray Cycle

I am a time traveler. I saw the beginning and the end. Yet the end was the beginning. The original human was not an ape. He was a gray alien - with huge eyes, hairless, toothless. He came to Earth, adapted to the atmosphere, and transformed over millions of generations into modern humans. Hair came, teeth grew, eyes became smaller. Humanity forgot its origin. But the circle is closing. Radioactivity will transform everything back.
After the great atomic war, humans will lose their hair, lose their teeth, their heads and eyes will grow. Generation by generation - until all humans have become Grays again. These Grays will invent a time machine. They will travel to the past to warn their ancestors before the war. But the humans of the past will not understand them. They will hunt the Grays, dissect them, kill them. The saviors will be declared aliens.
The war will come. The ash will fall. The cycle begins again. This is not a novel about extraterrestrials. This is the true story of humanity - written down by a time traveler who has seen the beginning and the end. And who keeps trying to warn us. Before it is too late.