The known Universe

This video starts from the Himalayas and reaches the farthest corners of the Cosmos, which is believed to have a diameter of about 40 billion light years, whilst the known universe has a diameter of 13.7 billion light years, which means that we can only see and observe a fraction of the Cosmos. That is why it is maybe illogical to believe that Earth is the only planet with appropriate conditions to maintain life. That is why NASA and other bodies are trying to find a planet similar to our one. The question is what would we do if we found it?