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Post by ant-mac on Oct 24, 2018 23:32:36 GMT
Yes, I do believe there is, at least, simple life, such as: plants, on other planets in our nearly infinite universe... Intelligent Life, Not sure, but the odds are in favor of that existing, somewhere, too! Simple life can encapsulate multiple forms of life.
Single-celled life, or colonies of singe-celled life can come from more than one kingdom of biological life.
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Post by alpha128 on Oct 24, 2018 23:45:44 GMT
Almost certainly there is some kind of life out there, even if it is just bacteria. There is probably plant and animal life. As for alien civilizations, that depends on the great filter.
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Post by them1ghtyhumph on Oct 24, 2018 23:53:08 GMT
Honestly do you actually believe that there is life on other planets? Consider that there are billions of planets in the universe, it makes sense to me that there are life on other planets. I'd say odds are that there is
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Post by Deleted on Oct 25, 2018 0:02:39 GMT
There is as yet insufficient data for a meaningful answer.
Yes, the number of planets is extremely high - tens of billions in our galaxy alone.
But what we don't know is what the probability of a planet developing life is. It may be that one planet in ten does this, in which case life is abundant on a galactic scale. But then again it may be that the probability is one in a trillion trillion, in which case we're very lucky that there's even one such planet. People may throw guesses around as to what that probability actually is, but that's all they are - guesses.
Two things seem relevant to me. One, Earth developed life pretty rapidly (in geological terms) after the planet cooled enough to allow it. Which could indicate that developing life is easy and common.
But then there's the Fermi paradox - if life is common, where is everyone? Species should have been developing since long before we came along, so why aren't we at least seeing radio signals, detecting megastructures around alien stars, finding von neumann machines entering the solar system, etc?
It's fun to speculate, but in the end all we can say is that we really don't know. Hope we find out one day, though.
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Post by ant-mac on Oct 25, 2018 0:16:44 GMT
But then there's the Fermi paradox - if life is common, where is everyone? Species should have been developing since long before we came along, so why aren't we at least seeing radio signals, detecting megastructures around alien stars, finding von neumann machines entering the solar system, etc? The Fermi Paradox only really applies if the discussion is solely focused upon intelligent life.
The question of whether or not there is life on other planets does not specify that it must be intelligent.
If it exists, it might just be simple or perhaps even complex life.
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Post by CynicalDreamer2 on Oct 25, 2018 0:42:16 GMT
Of course! There’s no way we’re the only intelligent life in the entire universe. Simple life, also no doubt about it.
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Post by Deleted on Oct 25, 2018 1:41:27 GMT
But then there's the Fermi paradox - if life is common, where is everyone? Species should have been developing since long before we came along, so why aren't we at least seeing radio signals, detecting megastructures around alien stars, finding von neumann machines entering the solar system, etc? The Fermi Paradox only really applies if the discussion is solely focused upon intelligent life.
The question of whether or not there is life on other planets does not specify that it must be intelligent.
If it exists, it might just be simple or perhaps even complex life.
Good point, thank you for the correction.
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Post by mslo79 on Oct 25, 2018 4:46:13 GMT
Life as in bacteria, maybe.
Life as in intelligent life, probably not.
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Post by ck100 on Oct 25, 2018 6:41:00 GMT
I don't know about a full-on alien race out there, but there is a possibility for some kind of creatures out there that would be more advanced than creatures on Earth.
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Post by Xcalatë on Oct 25, 2018 10:05:31 GMT
Of course there is life on other planets, its simple math: there are Billions of stars with Billions of planets.
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Post by Deleted on Oct 25, 2018 12:18:23 GMT
Of course there is life on other planets, its simple math: there are Billions of stars with Billions of planets. I can't help but hear Carl Sagan's voice as I read that one.
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Post by lenlenlen1 on Oct 25, 2018 15:18:11 GMT
Consider that there are billions of planets in the universe, it makes sense to me that there are life on other planets. ^^^THIS^^^. There may even be Trillions of planets. Even if you take "winning the lottery" odds you still have a great multitude of possibilities.
Fermi's Paradox asks "Well then where are they?" What Fermi didn't take into account is that they may be SOOOO far away that they just haven't gotten here... yet.
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Post by ant-mac on Oct 25, 2018 15:25:12 GMT
Of course there is life on other planets, its simple math: there are Billions of stars with Billions of planets. I can't help but hear Carl Sagan's voice as I read that one. One of my heroes.
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Post by kevin on Oct 25, 2018 15:32:21 GMT
Yes with pretty much 100% certainty. Considering the trillions of galaxies, each having billions of stars, most of them having multiple planets, the chance of there not being life on another planet is astronomically small (= in practical terms zero). There are probably millions of planets in the universe very similar to earth and that's not even taking into account life that isn't exactly the same as we know it. The building blocks of life are quite abundant in the unvierse as far as we know. Water is far less rare than we once thought (there are even moons in our solar system with water oceans under ice) and primitive organic components have even been found on extraterrestrial objects. I recently had a course about probability and statistics at the university and that once again solidified my statement. If there is no life on other planets, it would be by far the most statistically unlikely event in the entire universe.
The next question is if there is also intelligent life. I expect the overwhelming majority of life on other planets to be microbial, with a very small section reaching multicellular levels like animals on earth. While the chance of life becoming intelligent like humans is incredibly small, once again the sheer number of planets makes me believe that there also has to be intelligent life in the universe. The distance between these civilizations could be very big, but even the fact that we're the only current intelligent civilization in our own galaxy is very unlikely, let alone the only intelligent civilization that ever lived in our galaxy or in the universe for that matter. We've only been sending out radio signals into space for a short time period. Any civilization living more than let's say 50 - 70 lightyears from us would have no idea we exist, because our radio signals haven't reached them yet. And astronomically speaking 50 - 70 lightyears is almost nothing. And we also need to remember that we are only listening to a very, very small portion of space along a very narrow bandwidth. Even if an alien civilization already got our message, deciphered it and decided to send something back at a for us reasonable bandwidth at the exact right location, the chance of us picking it up is tiny.
So yes, I do believe alien life exists and I think there is a reasonable chance of us finding microbial alien life in the near future. Intelligent life will, however, be a much bigger challenge. Due to the distance between planets and the amount of luck needed for both parties to receive radio signals, it may take a very long time before intelligent contact is made. And this is making the assumption that humanity has that time and doesn't destroy itself at some point, which is quite an assumption. That also makes me realize that the number of alien civilizations currently alive is probably a tiny fraction of all civilizations that ever lived. I can see how a lot of the civilizations would destroy themselves within a timespan of a few thousand years by simply becoming too powerful (either with weapons, environmental damage, overpopulation, you name it).
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Post by CoolJGS☺ on Oct 25, 2018 15:36:32 GMT
Nope.
There's no reason to think there is simply on the basis of the universe being a big place.
EDIT: I suppose it's possible for there to besome kind of crazy microbe out there lving in an impossible place, but life as it is on Earth? Nah.
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Post by koskiewicz on Oct 25, 2018 17:14:43 GMT
It largely depends on how "life" is defined.
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