Answer, Please Answer — Ben Bova

Two soldiers stationed at an isolated outpost in Antarctica pick up mysterious signals coming from a distant star. As they decode the message, they uncover an alien civilization's history with nuclear energy - from its first discovery through its weaponization. Will the aliens find a path toward peace, or destroy themselves in nuclear war?

This thoughtful sci-fi tale explores humanity's own nuclear predicament through the lens of an extraterrestrial message.