Even if there are like Earth like planets, I think we are Unique in the whole Universe.
My logic is very simple:
Within a few Centuries of Science and Technology, we made such a progress. Now if there is really Alien life, I don’t think they will also be in our 20th Century of the Civilization. ATleast some of them have to be with 100K years civilzation, in which case we would have already met them.
Or we would have been influenced by them over a thousand years ago.
