statistically speaking, the odds that there isn't intellegent life in the universe is astronomical, simply because of the number of planets that are out there. That said, the question of if we will ever contact them is a good one, and i think the answer depends on one thing, and one thing only. If we develop faster than light travel, we will contact them, if we do not, we won't. mankind doesnt have the patience to travel decades just to make contact, and if they can decode the transmissions that leave earth, intelligent aliens will most likely want nothing to do with our violent race.