Thus far the space provided - is not the only habitat of the carriers other reason. Therefore, if we will be looking for other civilizations draw their attention only to them, then, paradoxically this statement, even if the increase in the power of boundless resources of our cognitive activity, we will only narrow the scope of your search. We all run the risk to overlook certain razum.4. Contact civilizations Today, the fundamental possibility of contact with other civilizations, we look quite optimistic. But there is at least some basis for such optimism?