Jack of Harts

Few people know that the worlds we live on now were terraformed long ago. It is not taught in our schools. Our government hides the truth by bulldozing the evidence that anyone ever lived there before us. They have never been able to find everything, but they have kept most people and most news networks from noticing. And so few people know that we are living on worlds where other people lived long ago. Who were they? What did they look like? Were they humans like us? Or were they something else entirely that simply needed the same eco system we do?