First Alien life would be probably most simplest form of life. Chance to humans find advanced civilization just like that on some planet are very low.
Some rumors say humans are not from planet earth. Something in us give scientists evidence that we not react on sun like other animals, and they say there was big chance that we are from some planet without sun at all. We looked different but our civilization is not from Earth.
Some people in this forum are definitely not from here.