Quote:
Originally Posted by crockett
Meaning, just assuming that all advanced life in the galaxy would end up with the aim of space travel is sort of deluded. Perhaps there are cities of Sea Monkeys on Europa, but they have plenty of resources and have no reason to look else where. Would that mean they are not intelligent life, just because they don't want to or have no need explore elsewhere?
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what you are saying is that you think the great filter is step 9 in Hansen's list.
Quote:
With no evidence of intelligent life other than ourselves, it appears that the process of starting with a star and ending with "advanced explosive lasting life" must be unlikely. This implies that at least one step in this process must be improbable. Hanson's list, while incomplete, describes the following nine steps in an "evolutionary path" that results in the colonization of the observable universe:
The right star system (including organics and potentially habitable planets)
Reproductive molecules (e.g., RNA)
Simple (prokaryotic) single-cell life
Complex (archaeatic and eukaryotic) single-cell life
Sexual reproduction
Multi-cell life
Tool-using animals with big brains
Where we are now
Colonization explosion.
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you very well may be right. I happen to believe the filter happenS earlier.
Another possibility (for me) is that evolution in the universe would most likely be on the same timeline everywhere, consequently, no alien civilization has achieved the tech level needed to reach us in any capacity.
but I'm more inclined to think we're an anomaly.