I think it’s a safe assumption that there’s life all over the universe...
Originally Posted by Jacuzzme
Enrico Fermi would both agree and disagree with what you say.
The "Fermi Paradox" is showing its age in some ways. But I have become very interested in two ideas recently:
The first is an older one: as evidenced by our current trajectory, any advanced civilization will likely kill itself after a few thousand years, more or less. Long before we can discover them or they will discover us.
The second...which I find absolutely fascinating...has to do with the theories around "multiverses."
There are theories that contain estimates that there are somewhere on the order of 10^61 alternate universes out there, each with its own unique conditions, rules, physical properties, etc. And that this is the only one with all of them that lined up in just such a way as to produce us. Us and no one else. No one.
To support that idea, I would point out that there are many "unique" situations that led to our existence.
Here are two that are really important and easy to understand:
One is that it is VERY unusual for a planet the size of Earth to have a moon that is the size of our moon. VERY unusual. And the tidal effects of the moon alone, on both sea and land, are major driving forces in the way life has evolved on this planet.
The second is the location of Jupiter. Also very unusual. Many extra-solar systems that we have discovered contain Jovia-sized planets. They seem to be very common. What is NOT common with ours is its location.
In most of these other systems, these huge planets orbit much closer to their stars. Our Jupiter most likely started out there. But then it "migrated" to its current position, out beyond Mars. And the result of that is that it serves as a massive "vacuum cleaner"...a "shield" that gobbles up many of the comets and other inward-bound objects and prevents them from colliding with us. The result has been a massive decrease in the frequency of planetary extinction-level events caused by these objects. We are living in unusually quiet times, in those terms.
I love this shit.
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