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Why Isn't the Milky Way Crowded With Mechanical or Biological Life?-Stephen Hawking's Answer

In his well-known lecture on Life in the Universe, StephenHawking questions: "What are the chances that we will encounter some alien form of life, as we explore the galaxy?" If the argument of the time scale for the presence of life on Earth is right, Hawking states "there ought to be many other stars, whose planets have life on them. Some of these stellar systems could have formed 5 billion years before the Earth. So why is the galaxy not crawling with self-designing mechanical or biological life forms?" Why hasn't the Earth been visited by an alien life, and even colonized? Hawking questions. "I discount suggestions that UFO's contain beings from outer space. I think any visits by aliens, would be much more obvious, and probably also, much more unpleasant.What is the explanation of why we have not been visited? One possibility is that the argument, about the appearance of life on Earth, is wrong. Maybe the probability of life spontaneously appearing is so low, that Earth is the only planet in the galaxy, or in the observable universe, in which it happened. Another possibility is that there was a reasonable probability of forming self-reproducing systems, like cells, but that most of these forms of life did not evolve intelligence."
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We are used to discerning of intelligent life, as an unavoidable significance of evolution, Hawking highlighted, but it is more probable that evolution is a casual process, with intelligence as only one of a huge number of conceivable results.

In contrast the microbial world will live on, even if all additional life on Earth is wiped out by our activities. Hawking's key vision is that intelligence was a doubtful growth for life on Earth, from the timeline of evolution: "It took a very long time, two and a half billion years, to go from single cells to multi-cell beings, which are a necessary precursor to intelligence. This is a good fraction of the total time available, before the Sun blows up. So it would be consistent with the hypothesis, that the probability for life to develop intelligence is low. In this case, we might expect to find many other life forms in the galaxy, but we are unlikely to find intelligent life."
Intelligence, Hawking considers differing to our human-centric existence, may not have any long-term existence value. One more prospect is that there is a rational chance for life to exist, and to evolve to intelligent creatures, but at certain point in their technological growth "the system becomes unbalanced, and the intelligent life terminates itself. This would be a very doubtful deduction. Hawking fancies one more option: that there are other forms of intelligent life out there in the universe, but that we have been ignored. 

                                              If we must pick up indicators from alien race, Hawking advises, “we should have been wary of answering back, until we have evolved" a bit further. Encountering a more progressive civilization, at our current stage,' hawking states "might be a bit like the original inhabitants of America meeting Columbus. I don't think they were better off for it."

(If you find any error or miscalculation in this article then please feel free to share in comment and if you want to expand this article then comment below)

1 comment

Unknown said...

In a nutshell we are smart as a box of rocks...dayum steve thts harsh

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