First Contact: Carl Sagan on making contact with extraterrestrials [Carl Sagan Tribute Series]
Honestly do you think that the infinite universe only has planet earth with people on it?
I do believe that somewhere out in the universe there are other civilizations but we will never know about.
Scientists have been trying to use radio signals in order to communicate with the outer space for a long time but still no outcome to reveal and this is not dissapointing simply because there are billions of stars out there and the nearest one is 200 light years away which increases the probability of other civilization existence but it just needs more time and dedication.
When the time comes and we are able to transport by the light speed, then we would be able to find most of this amazing universe secrets, until then we will keep trying with more perseverance and hope.