User blog comment:Spark321939/Are aliens good or will we be advanced enough?/@comment-1197011-20130430012402

This is an interesting discussion. Like you, I have no answers, only guesses, but I'll tell what I think: I think the universe is teeming with life, but very few of them will be creatures similar enough to us to have any possible interest on Earth. Many may not even recognize us as life, and we might very well not recognize them either. Less than 1%, it's my educated guess, will be close enough to us in the psychological sense to be able to be classified as good or evil. The others will be just strange and incomprehensible for us. Again, just my opinion.

As for what they saw in the sky in 1066, there are many possible answers. Was it a living creature unknown to modern science? I think that's likely. Was it technology from other times or worlds? Could very well be! The cosmos is weirder than we can imagine as they say, and to think that we have discovered even the tip of the iceberg is too generous :)