Are aliens real? | The Tylt

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Are aliens real?

#AliensAreOutThere TL;DR:

  • The universe is such a huge place that at somewhere, at some point in time, a civilization mature enough to travel and colonize other planets existed. 

#WeAreAlone TL;DR:

  • Because the universe is such a huge place and we have encountered zero evidence for intelligent life beyond us, there must be a "Great Filter."
  • The more advanced a civilization becomes, the more likely it is to destroy itself for whatever reason. This is the Great Filter. 
  • We are alone because we haven't destroyed ourselves—yet. 

If you want to understand both sides, read this. For a quick overview, keep scrolling down. 


Let's suppose there are nine steps that must be taken for intelligent life to spread beyond its planet. This is Hanson's list:

  1. The right star system (including organics and potentially habitable planets)
  2. Reproductive molecules (e.g., RNA)
  3. Simple (prokaryotic) single-cell life
  4. Complex (eukaryotic) single-cell life
  5. Sexual reproduction
  6. Multi-cell life
  7. Tool-using animals with big brains
  8. Where we are now
  9. Colonization explosion.

There are three possibilities, given this list. 

  1. We're special and are the first to get past the Great Filter.
  2. We already somehow got past the Great Filter.
  3. We're about to hit the Great Filter and will all die. 

Either way, in this scenario, the outcome is that we're alone. For many, many reasons, it's incredibly difficult for intelligent life to become truly interstellar. 


Tim Urban gives 10 scenarios why aliens can be out there but we haven't discovered them yet. Give his piece a read for further explanation.

  1. Super-intelligent life could very well have already visited Earth, but before we were here.
  2. The galaxy has been colonized, but we just live in some desolate rural area of the galaxy.
  3. The entire concept of physical colonization is a hilariously backward concept to a more advanced species.
  4. There are scary predator civilizations out there, and most intelligent life knows better than to broadcast any outgoing signals and advertise their location. 
  5. There’s only one instance of higher-intelligent life—a “superpredator” civilization (like humans are here on Earth)—that is far more advanced than everyone else and keeps it that way by exterminating any intelligent civilization once they get past a certain level.
  6. There’s plenty of activity and noise out there, but our technology is too primitive and we’re listening for the wrong things.
  7. We are receiving contact from other intelligent life, but the government is hiding it.
  8. Higher civilizations are aware of us and observing us (a.k.a. the “Zoo Hypothesis”). 
  9. Higher civilizations are here, all around us. But we’re too primitive to perceive them.
  10. We’re completely wrong about our reality. 
Are aliens real?
A festive crown for the winner