Many thought it was the end times. The thing eventually disappeared over the horizon. We felt the ground shake as it crashed into the surface of the planet. A plume of dark smoke rose in the distance. But no fiery death rushed to greet us. It wasn’t but a few hours later that a team was put together to investigate. What they found defied all explanation. It was some sort of structure, but the size of it baffled. Even though it had broken into pieces when it crashed, the smallest of the pieces...