The prospect of alien greed, colonialism is very alarming. But Conway Morris thinks about another scenario is also very sad and are more likely to come true. That we are completely alone in this universe.

The universe is so large and extraordinary in it can contain at least 100 billion galaxies. Our solar system is quite young compared to the entire universe, about 4.6 billion years old compared to 13.7 billion years. So, there was plenty of time for an alien civilization to appear and flourish more than they do. But the fact that aliens have not contacted us apart is a sign that the universe seems to have no life.

Wide gap separating the alien civilization is not too large obstacles with touch operation. "At least until the present time, the distance of 100,000 light years is not to pass" - he declared.

Of course, not everyone agrees with that of Morris. Another study by scientist Albert Harrison posted on the same issue with Morris argued that the detection of extra-terrestrial life can bring interesting things instead of fear. That is because the alien life may be anonymous or curious primitive humanity.

The first evidence of alien life may be one of the people from Mars or other planets like our own solar system. It could also be an electrical signal from the earth suddenly darted. Whatever situations happen, the script will not be the same in the War between the film world, with scenes alien spacecraft invading our contemporary.

Based on what has happened in the last 50 years as technological development, space flight, space science and human understanding of the universe has prepared us very well for the prospect meet alien life.