Our current technology is extremely limited in the search for Intelligent life, considering the size of the observable universe . We have barely begun to search for planets in our own galaxy, the distances involved between star systems is too great to even think of exploration during our lifetimes unfortunately. I like the analogy that theoretical physicist Miciho Kaku made of different types of possible advanced alien civilizations that can exist and we would not even be aware of them."Imagine walking down a country road, and meeting an ant hill. Do we go down to the ants and say, 'I bring you trinkets. I bring you beads. I give you nuclear energy and biotechnology. Take me to your leader?' Or we have the urge to step on a few of them??" We might see ourselves as intelligent species but if advanced civilisations have been around since the first galaxies formed billions of years ago after the bigbang, we could verywell just be another ant hill under a supergalactic highway.