Hypothesis:

[Shinomori]

If we take Earth as a model then all life sustainable planets should follow the same evolutionary path. Thought?

First off I do not have this hypothesis because i think humans are the greatest animals ever. I am also not trying to arrogant saying that our system is the best. That being said I have been thinking about this and it makes a lot of sense in my mind. With the circumstances that a planet needs to sustain life and from what we know about our own existence and biological make up, it seems that the way life evolved on our planet would be the norm on the planets that came before us and will come after us. This is not to say however that humans are the dominant species on all of the other life sustaining planets in the universe. For example if a planet does not have a meteor wipe out it's dinosaur population there may not have been the ancestors for humans to evolve from. The other side of that coin is that there could be primitive human like aliens out there living with dinosaurs.

So what is your scientific or quasi scientific thought on the subject?

 

[Shoggoth2588]

Well, if the Dinosaurs were never wiped out in the first place than what would have stopped them from continuing to evolve until they got to a point where they could have been as intelligent as we are? The were around hundreds of millions of years before us so they had plenty of time to go humanoid. There could be reptilian-humanoids on other Earth-like worlds out there!

 

[Vicarious Reality]

Yeah, all aliens look like humans but with pointy ears and large eyes.
Damn if i've ever seen a more illogical, self centered and unimaginative theory.
Life can exist in so many conditions and shapes it's... తెలుసుకోరాని