> The chances of the only two civilisations in the entire galaxy happening to be neighbours, among 400bn stars, absolutely stretches the bounds of rationality.

> The chances of the only two civilisations in the entire galaxy happening to be neighbours, among 400bn stars, absolutely stretches the bounds of rationality. I think this is dependent on the conditions by which one or more related lifeforms emerged. It's entirely possible life here came from there or from there to here and the reason it's here and there is because it's close. Chances assuming no travel between the two places is just silly.