I have to write a brief summary about the article that I read from The New York Times. They are trying to build some sites that can increase the capacity of searching for signs of life. The new Allen Telescope Array will allow them to search over a million stars within 2 decades.
Let me tell you my opinion. Is there any advanced civilizations on other planets in this galaxy and other galaxies? I don't personally think so. I think that there is a good chance that there are numerous of planets with living things that can swim or crawl. It's difficult for the living species to become complex through evolutionary process. I think that we are only one kind.
But, it cannot hurt to search for the sign of life. If there are advanced civilizations out there then they may have been observing us. I think that is extremely unlikely.
For further reading, click on the link below.
Stretching the Search for Signs of Life