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Saturn moon 'able to support life'

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21–30 of 268 posts

Re: Saturn moon 'able to support life'

#21

Earlier quoted context omitted.

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

I've thought about this and my conclusion is that we will likely leave behind a very strange pattern of certain natural resources. "Oh, look, here's a vein of copper! It's getting better, and better, and, that's weird, it's gone now and there's a complete break in the strata for some reason." Over time new mountains may form some new deposits, but it may be noticeable in the older mountains (that are today the younger mountains) for a long time.

If we make it for another few hundred years, not only will there be a mass extinction, but there will also probably be a traceable sudden explosion in a novel form of gene transfer and creation that can't be explained by any other theory. The modern fashionable self-loathing idea that we are a uniquely biodiversity-destroying organism may be merely a consequence of our current point of view; rather than "extinction" this could in fact be an inexplicable explosion in diversity if you could see 1000 years into the future. But of course the mass extinction will still be there. I haven't done an analysis but it may also be the case that the extinction has a very characteristic pattern; again, rather than the fashionable self-loathing model of "humans just destroy everything" it may be noticeable that fauna died out in favor of things that are clearly domesticated even just from their skeletons, and that human predators were preferentially extincted, etc.

Re: Saturn moon 'able to support life'

#22

Earlier quoted context omitted.

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

> I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before.

How intelligent is intelligent?

Homo Neanderthalensis predated Homo Sapiens by about 100,000 years. They were intelligent enough to build tools and have communities.

Oldest corvid fossils are 25 million years old[1]. They are known to be very intelligent and modern crows can solve 8-step puzzles, build tools, teach their young etc. etc.

I mean, intelligence has evolved independently many times in animals on earth. It's hard to say which species was first to become intelligent, but I'm pretty sure humans weren't the first.

[1] http://www.reed.edu/biology/professors/srenn/pages/teaching/...

Re: Saturn moon 'able to support life'

#23

Earlier quoted context omitted.

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

I wonder about satellites. How far above the earth's surface would a satellite have to be to keep atmospheric drag low enough to keep an artificial satellite in orbit for a long long time. And how big would it need to be for it to be naked eye visible at that distance. And what could be done to make it unlikely to be mistaken for a natural phenomena? Have clusters of satellites in geometric patterns? 65 Million years is a long time. That sounds like a more interesting project than the "Long Now" effort.

Re: Saturn moon 'able to support life'

#24

Earlier quoted context omitted.

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

How do we know that 65 million years is long enough for a species with a human-like intelligence to evolve? What if our evolution was merely a biological fluke that took much less time than usual?

Re: Saturn moon 'able to support life'

#25
post #4

If life is there, completely disconnected from earth life, it would be dramatic. That would mean that our solar system, has life on at least two, out of nine planets. That would seem to indicate that life is a fairly common things on planets. It would allow to adjust the drake equation, to easily predict millions of planets with life. And that would mean a high probability of many advanced, intelligent civilizations…

Well, deep sea, thermal vent life is predominantly blind on earth at least. One may postulate this form of life is much less likely to form technological civilizations thus moderating such. Thoughts?

Consider the way such life looks to us. It's stuck down there, hampered by its environment. We might look that way to an advanced civilization. "Check out those humans, they're intelligent but they're stuck way down there on the crust of that planet, under all that air, stuck in their gravity well"

Re: Saturn moon 'able to support life'

#26

Earlier quoted context omitted.

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

Some of the skeletons will be wearing gold jewelry.

Re: Saturn moon 'able to support life'

#27
post #4

If life is there, completely disconnected from earth life, it would be dramatic. That would mean that our solar system, has life on at least two, out of nine planets. That would seem to indicate that life is a fairly common things on planets. It would allow to adjust the drake equation, to easily predict millions of planets with life. And that would mean a high probability of many advanced, intelligent civilizations…

It would be, but let's not get ahead of ourselves: all they've done is found evidence that it would be habitable by extremophile organisms. There's no evidence there actually are any.

Re: Saturn moon 'able to support life'

#28
post #4

If life is there, completely disconnected from earth life, it would be dramatic. That would mean that our solar system, has life on at least two, out of nine planets. That would seem to indicate that life is a fairly common things on planets. It would allow to adjust the drake equation, to easily predict millions of planets with life. And that would mean a high probability of many advanced, intelligent civilizations…

It would be, but let's not get ahead of ourselves: all they've done is found evidence that it would be habitable by extremophile organisms. There's no evidence there actually are any.

Re: Saturn moon 'able to support life'

#29
post #22

Earlier quoted context omitted.

I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. I mean, if humanity goes extinct and it's another 65 million years before another intelligent species evolves, what evidence would they have of our existence? All our buildings would've long since crumbled into dust or been crushed by plate tectonics. Metal will corrode and rust away after a few t…

> I'm kinda curious if there's any evidence that would support or rule out intelligent life having existed on earth before. How intelligent is intelligent? Homo Neanderthalensis predated Homo Sapiens by about 100,000 years. They were intelligent enough to build tools and have communities. Oldest corvid fossils are 25 million years old[1]. They are known to be very intelligent and modern crows can solve 8-step puzzles…

We're sharing the planet with several intelligent species at this moment. Maybe a worthwhile distinction would be intelligence sufficient to dominant an entire planetary ecology; or sufficient to intentionally become multi-planetary.

Re: Saturn moon 'able to support life'

#30
post #4

If life is there, completely disconnected from earth life, it would be dramatic. That would mean that our solar system, has life on at least two, out of nine planets. That would seem to indicate that life is a fairly common things on planets. It would allow to adjust the drake equation, to easily predict millions of planets with life. And that would mean a high probability of many advanced, intelligent civilizations…

Based on the developments in exo-planet research along with discoveries like this over the past couple of years, I would conjecture that life is ridiculously common. But by life, I mean microbial life. I would imagine that multi-cellular life is much rarer, and life capable of reaching human-level intelligence and beyond is probably absurdly rare, on the level of something like one species per galaxy. It's all worthl…

I'd guess that microbial life would evolve into cellular life almost anywhere there was enough heat.
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