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Scurrybt 2023 年 4 月 24 日 上午 7:59
Do you think there are aliens outside our planet?
I do, because the universe is nearly endless and the possibility that we are the only intelligent life in the universe is way too small. Aliens probably visited here before too!
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引用自 zeke:
From the way I see it, there are two particular issues when it comes to discussions of aliens that are often overlooked (though the second point has seen mention in this thread; I'll try to keep this, relatively speaking, short):

1. Aliens might very well exist - but there is a high probability it doesn't really matter (and that we may be forever ignorant of each-other's existence). The observable universe is 93 billion light-years across. The universe is much too large, everything is far too distant. And from our understanding of physics, the speed of light is, what you might call, the 'cosmological speed limit'. Nothing can travel faster than light*[see below regarding faster-than-light travel] (and no, inflation doesn't count - it is its own special subject).

The Milky Way galaxy is 100,000 lightyears across. The closest known galaxy is the Canis Major Dwarf (a satellite of the Milky Way) at 25,000 light-years away. Andromeda is 2.5 million light-years away. The Local Group (the largest structure the Milky Way belongs to) is 10 million light-years across. If you could reach just 50% the speed of light, it would take you 50,000 years just to reach Canis Major Dwarf. For humans (or aliens) bound by the speed of light to cross those distances, it is practically impossible. Not to mention anything that currently exists, right now, beyond the Local Group is almost entirely beyond reach (heck, one day, not even light from outside of the Local Group will be able to reach us thanks to the expansion caused by dark energy).

*There are hypothetical possibilities that could potentially allow for pseudo-faster-than-light travel (you would, in actually, still be going slower than the speed of light but it could allow for travel to a distant point in less time than it would normally take light to reach; details on that get a bit complex and depend upon the hypothetical method) but it would require hypothetical exotic matter for which we have zero evidence that it actually exists. All we have are some bits of math that say that such things could potentially exist without breaking our current understanding of physics ('could potentially exist' and 'does exist'/'is likely to exist' are two things that definitely should not be confused here).
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2. Alien life might very well exist - but that doesn't mean they are 'intelligent'. Let's look at the only place that we know of that has life: Earth. Out of all the species on Earth, humanity stands 'head-and-shoulders' above the rest when it comes to intelligence (let's refer to it as "superior intelligence"). There is currently no other species on Earth capable of the advanced forms of thought required to form what we'd recognize as a civilization; to create all the wonderful (or not so wonderful) technologies, scientific theories, and advanced social coordination/cooperation needed to achieve what we have achieved thus far (or for that matter, to achieve what our ancient pre-homosapien ancestors were able to achieve). Any alien species that achieves the space-faring and/or space-observing technologies that we have achieved so far will have to be of superior intellect. Some of the smartest animals on Earth (besides humans) are chimpanzees and dolphins (what we might consider to have 'advanced intellect') - are creatures that could barely be considered to rank on any sort of cultural or technological scale. The number of species on Earth that displays even advanced intellect is relatively few. High levels of intellect is not something that evolution seems particularly keen on bestowing upon species here on Earth. So this begs the question: even if the local group is teeming with life upon countless planets, how many have produced a species with superior intellect? Could humanity be the only one within the Local Group (here-and-now and/or past and future)? And even if we aren't, how many thousands or millions of light-years away might the next superior intelligence be?

Obviously these are question that no one can answer with any statistical probability (for we have a sample size of only one life-bearing planet). But our own experience here on Earth certainly raises the specter-of-possibility that superior intelligence might be an incredibly unlikely statistical anomaly within (what is potentially) the incredibly unlikely statistical anomaly that is a life bearing planet in the first place. A statistical rarity within a statistical rarity, even with bearing in mind the 'law of large numbers', can almost lead to the lack of existence of a phenomenon having happened. We could very well be the only superior intelligence that has emerged on any planet within the observable universe.

corrected diameter of the observable universe
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目前顯示第 46-60 則留言，共 61 則
Scurrybt 2023 年 4 月 24 日 下午 1:07 
引用自 Shizune：
I mean in theory yes.
Like I can point out one reason, if we accept that even the whole claim of demons and angels existing as some do, by default those are both aliens, their not from earth.

Like if deities exist, their aliens to, their not on earth either, nor are anything that are their minions/followers now that I think about it
Good way of perceiving it!
#46
Scurrybt 2023 年 4 月 24 日 下午 1:33 
引用自 TWPanda77：
They already live amongst us :o
True
#47
AdahnGorion 2023 年 4 月 24 日 下午 1:48 
We know for a fact that there are aliens outside our planet.

I once saw aliens on sputnik
#48
Cwispy 2023 年 4 月 24 日 下午 1:54 
When I was younger, I did see a flying saucer up close. I still have trouble explaining what it was. It was behind the car I was in and slowly drifted up. My dad saw it too.
#49
Scurrybt 2023 年 4 月 24 日 下午 1:59 
引用自 Keroro：
When I was younger, I did see a flying saucer up close. I still have trouble explaining what it was. It was behind the car I was in and slowly drifted up. My dad saw it too.
Did it get a parking permit tho?
#50
Cwispy 2023 年 4 月 24 日 下午 2:03 
引用自 Scurrybt：
引用自 Keroro：
When I was younger, I did see a flying saucer up close. I still have trouble explaining what it was. It was behind the car I was in and slowly drifted up. My dad saw it too.
Did it get a parking permit tho?

We were actually driving
#51
Lupinus Rictus 2023 年 4 月 24 日 下午 2:04 
Yes there's definitely alien life outside our planet, there's probably alien life on it as well
#52
$2 Hero 2023 年 4 月 24 日 下午 5:31 
Nobody can solve my riddle?
#53
The Emperor Of Mankind 2023 年 4 月 24 日 下午 5:39 
I would say it's highly probable. There could very well be some Xenos on their equivalent of the steam forums discussing this same topic. Are we alone, or is someone else out there? I would hope that we are not alone. The universe is vast beyond measure. So unfathomably large that I can't believe that even if a race like us is 1 rare, that we're all that's out there. I just hope that what we encounter doesn't trend towards how aliens treat humans in Halo or 40k. I'm all for fighting off a race of genocidal aliens, but I really hope we don't have to.
最後修改者：The Emperor Of Mankind; 2023 年 4 月 24 日 下午 5:41
#54
Irene ❤ 2023 年 4 月 24 日 下午 5:43 
I think aliens exist but it's no big deal.

All living creatures are slaves to their environment. We're smaller than a tree because of oxygen limits. Fish and Birds are actually aliens in the concept. - they are from another type of environment (less or more water, pressure, so on).

So if you're going to find another planet, high chances are it has a different setting - less or more gravity, less or more oxygen, and you get different types of living being that struggled to find food in that environment and nothing more. So it's probably a bigger or smaller fish, or a low chance of a smaller monkey. Perhaps they are smart, they harvest food, and develop technology to harvest energy - but it's boring isn't it.

I think the only big deal is that those aliens can be an enormous giant fish that is x1000 bigger than a human. It is possible if there are planets 1000x bigger and having lots of water. Will you still look forward to step into such a planet? : P
最後修改者：Irene ❤; 2023 年 4 月 24 日 下午 5:46
#55
Scurrybt 2023 年 4 月 24 日 下午 5:45 
引用自 Irene ❤：
I think aliens exist but it's no big deal.

All living creatures are slaves to their environment. We're smaller than a tree because of oxygen limits. Fish and Birds are actually aliens in the concept. - they are from another type of environment (less or more water, pressure, so on).

So if you're going to find another planet, high chances are it has a different setting - less or more gravity, less or more oxygen, and you get different types of living being that struggled to find food in that environment and nothing more. So it's probably a bigger or smaller fish, or a low chance of a smaller monkey. Perhaps they are smart, they harvest food, and develop technology to harvest energy - but it's boring isn't it.

I think the only big deal is that those aliens can be an enormous giant fish that is x1000 bigger. It is possible if there are planets 1000x bigger and having lots of water. Will you still look forward to step into such a planet? : P
Hehe human go SQUISH
#56
yoo5137 2023 年 4 月 25 日 上午 2:34 
I want to belive that yes. But it seems all spieces at some point start dying out
#57
Phénomènes Mystiques 2023 年 4 月 25 日 上午 2:39 
Butter is not necessarily bad for you. :csdsmile:
#58
⍚MagusFromHeaven⍚ 2023 年 4 月 25 日 上午 4:40 
Aliens probably dying and went to look for another planet to repopulate and created the bible so his alien kids doesn't make the same mistake.
Fast forward to our time, there's spaceX and ww3.
#59
Rhila 2023 年 4 月 25 日 下午 9:42 
there are Angels. not sure about Aliens
#60
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