November 27, 2017

Is there anybody out there? Nice article on the Fermi Paradox

The Fermi Paradox is the stark contradiction between the high probability estimates of Extraterrestrial Life existing and the lack of evidence for the same. 

The basic arguments goes like this:

  • There are about 100 billion sun-like stars in our galaxy, some even older than our Sun.
  • Most of these stars ought to have planets around them. That makes for hundreds of billions of planets. Many of them will be potentially habitable.
  • Some of those planets can give rise to Life. And some of those can give rise to Intelligent Life too. That amounts to potentially millions of worlds with Intelligent civilizations.
  • Some of these civilizations might develop Interstellar travel. Even at a slow place, the galaxy can be colonized in less than a million years!

So the question is: If there are so many potential extraterrestrial civilizations, then why haven’t we come in contact with any such civilization at all? That’s the supposed paradox.


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