I wonder if another civilization had this same idea, and dropped a probe off some 70,000 years ago. Or perhaps the probe has yet to arrive, since elsewhere in

I wonder if another civilization had this same idea, and dropped a probe off some 70,000 years ago. Or perhaps the probe has yet to arrive, since elsewhere in this thread I see that comets dislodged by the perturbations of the passing stars are yet to arrive at Earth.