There is a fundamental question , what is Life? Do we say all terrestrial bioforms to be life. Life could have some other meaning too.
Living Organisms are examples of organized energy and complexity. But then Crystals which are highly organized structures and can even reproduce are not considered as living .
All forms of life work on electromagnetic forces . But then a galaxy is also a gravitationally organized system . Is it living ? Even if it is , light would take say 100,000 years to cross Milky Way. So the thinking time of galaxy would be 100,000 years and other processes much slow to observe.
Another question is that does more life exist in universe ? There are 100 billion stars in a galaxy and there are about 100 billion galaxies . Now considering the huge number of stars , the total planets would be enormous . Even if the probability of an earth like planet being very very minute . Still it is possible that few planets like earth might exist where conditions are suitable for life.
So maybe there is someone out there waiting!!!!
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