What If the Galactic Habitable Zone LIMITS Intelligent Life?
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Top Comments (10)
One bias not mentioned is our assumption of habitable planets. What about habitable moons?! Wouldn’t a high metalocity system include an abundance of moons? Would they be susceptible to the same problems or protected by their host planet?
If not for the late, heavy bombardment, we may not have had enough metals and other elements that are essential for technology as we know it. I wonder, of all the other earthlike planets, how many actually have a high enough abundance of the proper raw materials within the grasp of the planet's intelligent inhabitants.
"Most of us have never seen aliens" Always good to start a science video with a laugh. 😂 About the Fermi paradox, I think it's only a paradox if you're searching for solar conditions that will allow for life but if you're thinking about intelligent life and galactic civilization then you have to account for planetary and evolutionary conditions. My understanding is that from an evolutionary perspective the emergence of intelligence is a path dependent process. Which means that a finite number of paths that lead to intelligence will be practically zero percent of the space of possibilities of the evolution paths. Great video as always, btw!
Be sure to check out Matt discussing nuclear fusion on "How Sun Mythologies Are Universal" over on Fate & Fabled and tell them (politely) that Space Time sent you! https://youtu.be/utJZ8YmXOnc
The moon being so large (tidal energy extends the life of our metal core) and mix of land and water are probably rare being in the habitable zone of our star type. We also are almost as large as we could be and still get off the planet via rockets, giving us the gravity to maintain an atmosphere while still being able to escape.
"Is this why **most of us** have never seen aliens?" Blink. blink. What are you hiding, PBS?!
Mentioned more than once but not answered at least superficially: Why does high star metallicity cause more giant planets?
It's not just that. Most planets are also tidely locked, giving them no protection against sunlight while overheating one half and freezing the other. We have luck that we are spinning.
0:16 "most of us" ...
Huh??? 0:17 "most of us" ?!?! SAY WHAT?
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Top Comments (10)
One bias not mentioned is our assumption of habitable planets. What about habitable moons?! Wouldn’t a high metalocity system include an abundance of moons? Would they be susceptible to the same problems or protected by their host planet?
If not for the late, heavy bombardment, we may not have had enough metals and other elements that are essential for technology as we know it. I wonder, of all the other earthlike planets, how many actually have a high enough abundance of the proper raw materials within the grasp of the planet's intelligent inhabitants.
"Most of us have never seen aliens" Always good to start a science video with a laugh. 😂 About the Fermi paradox, I think it's only a paradox if you're searching for solar conditions that will allow for life but if you're thinking about intelligent life and galactic civilization then you have to account for planetary and evolutionary conditions. My understanding is that from an evolutionary perspective the emergence of intelligence is a path dependent process. Which means that a finite number of paths that lead to intelligence will be practically zero percent of the space of possibilities of the evolution paths. Great video as always, btw!
Be sure to check out Matt discussing nuclear fusion on "How Sun Mythologies Are Universal" over on Fate & Fabled and tell them (politely) that Space Time sent you! https://youtu.be/utJZ8YmXOnc
The moon being so large (tidal energy extends the life of our metal core) and mix of land and water are probably rare being in the habitable zone of our star type. We also are almost as large as we could be and still get off the planet via rockets, giving us the gravity to maintain an atmosphere while still being able to escape.
"Is this why **most of us** have never seen aliens?" Blink. blink. What are you hiding, PBS?!
Mentioned more than once but not answered at least superficially: Why does high star metallicity cause more giant planets?
It's not just that. Most planets are also tidely locked, giving them no protection against sunlight while overheating one half and freezing the other. We have luck that we are spinning.
0:16 "most of us" ...
Huh??? 0:17 "most of us" ?!?! SAY WHAT?