The Rat Chronicles: Metacognition

An alien race known as the Xzebuliens that exists in an alternate universe has developed the technology to create a rift in our own that appears on the blind side of the moon. They send asteroids through the rift and deflect them to land on all the major continents of Earth, containing a virus engineered to wipe out the human race, so they can leave their dying world behind after we are gone. However, there will be limitations to the virus, like how far and fast it spreads from the epicente...