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Who is alien? A living object from another planet is called to be an alien. So, we are now sure to make a difference between a foreigner and an alien. If the most human like species comes from another planet or solar system or galaxy should be called to be an alien species. There are many probabilities from a micro biotic to a macro biotic to be an alien on the earth now or future or long years ago. They may be more and far progressed and advanced than human or they are not. All ancient religious texts and scriptures have told on aliens in different names in different languages. But, all possibilities are waiting for evidence containable for human race.
If a man thinks that man is the best and advanced creation of nature, I think he is wrong. Man is not complete now. Most of the people on the earth are not able to receive the qualities of humanity. Some are so rich in virtue that they are eligible to take worship from others. The gifted persons on the earth have believed that if a supreme power creates the whole universe with similar types of galaxies then the presence of similar earths is not impossible. So, what are the doubts about the existence of aliens?
We recognise now that planets exist round many, even maximum, stars. We recognise that during our Milky Way Galaxy there are probable hundreds of thousands of planets which might be in lots of approaches like the Earth, with liquid water. The query then is whether or not lifestyles have developed on them – and we will but answer that.
Although we know how via Darwinian choice a complex biosphere evolved on earth around 4 billion years ago, we don’t yet understand the actual foundation of existence – the transition from complicated chemistry to the first metabolising, replicating systems. The best information is that we are able to have a better concept of the way that came about in the subsequent ten or 20 years and crucially, how in all likelihood it turned into to show up. This will deliver us a better know-how of ways in all likelihood it is to appear somewhere else. In that time, we are able to also have technologies that will allow us to better search for alien life.
But simply due to the fact there’s life elsewhere doesn’t mean that there is smart existence. My guess is that if we do discover an alien intelligence, it'll be not anything like us. It’ll be a few kind of electronic entity.
If we examine our records on earth, it has taken about 4 billion years to get from the first protozoa to our contemporary, technological civilisation. however if we look at the destiny, then it’s quite probable that within a few centuries, machines may have taken over – and they'll then have billions of years in advance of them.
In different phrases, the time period occupied by using organic intelligence is just a thin sliver among childhood and the lengthy technology of the machines. Because such civilisations would increase at distinctive fees, it’s extremely unlikely that we will find smart lifestyles at the identical degree of development as us. Much more likely, that life will nevertheless be either a long way less complicated, or an already fully digital intelligence.