Live data from Hacker News

Saturn moon 'able to support life'

bbc.com

211–220 of 268 posts

Re: Saturn moon 'able to support life'

#211
post #178

I always had this question - Can life exist outside our perception of biological life? Intelligent life might be an anomaly, and rare in the universe - but is it possible that life exists outside our perception of biology? Afterall everything is just rules and actions that lead to predictable reactions (unless quantum physics says something else) I look at artificial life - that exists in virtual environments. It loo…

Perhaps not what you meant, but the sun has a birth, a lifetime during which it throbs with 'life' and a death.

Meanwhile the Earth has a heart (core), blood (mantle), skin (crust) etc, it also throbs with 'life' unlike many other dead worlds out there.

Neptune is very much 'alive' compared to Uranus etc ...

Re: Saturn moon 'able to support life'

#212

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…

You might be able to find some of our shit still in orbit. Also, I'm not sure of the timescale for things to decay on the moon, but would something from Apollo be left up there? Depending on how far into the future, what if something bigger eventually got built?

65M years is a long time and I have no idea what, besides radiation and meteorites, would cause something to decay on the moon. Is it possible for something the size and rough composition of a car to survive?

Re: Saturn moon 'able to support life'

#213
post #178

I always had this question - Can life exist outside our perception of biological life? Intelligent life might be an anomaly, and rare in the universe - but is it possible that life exists outside our perception of biology? Afterall everything is just rules and actions that lead to predictable reactions (unless quantum physics says something else) I look at artificial life - that exists in virtual environments. It loo…

Define: life

;)

Re: Saturn moon 'able to support life'

#214

Earlier quoted context omitted.

Curious if anyone's ever observed something similar to this? It'd be super easy to detect if you're looking for it, but most miners aren't thinking "Hmm, I wonder if a previous intelligent species existed on earth millions of years before us."

I started thinking that another species after us would find it odd that there are so few hydrocarbon deposits - but would they look for something that's not there? Similarly, maybe there's something missing from the Earth that we're just not thinking of because, well, you can't miss something if you never had it.

If we cause a mass extinction, including that of ourselves, wouldn't we be creating a lot of hydrocarbon deposits eventually?

(Not asking critically - serious, I have no idea, do billions of people and whatever else we take down with us replenish what we've pulled out of the ground?)

Re: Saturn moon 'able to support life'

#215
post #178

I always had this question - Can life exist outside our perception of biological life? Intelligent life might be an anomaly, and rare in the universe - but is it possible that life exists outside our perception of biology? Afterall everything is just rules and actions that lead to predictable reactions (unless quantum physics says something else) I look at artificial life - that exists in virtual environments. It loo…

You mean like the silicon based rock creatures in that one star trek episode? :)

How about cellular automata simulating (spoiler) complex life forms in many dimensions, implemented in large polysaccharide constructions? :) (Greg Egan's "Wang's Carpets", later incorporated as a chapter into his "Diaspora".) http://bookre.org/reader?file=222997&pg=1 (http://archive.is/ocAgN)

Re: Saturn moon 'able to support life'

#216
post #178

I always had this question - Can life exist outside our perception of biological life? Intelligent life might be an anomaly, and rare in the universe - but is it possible that life exists outside our perception of biology? Afterall everything is just rules and actions that lead to predictable reactions (unless quantum physics says something else) I look at artificial life - that exists in virtual environments. It loo…

Define: life ;)

Yes, exactly, an example : https://en.wikipedia.org/wiki/Smallest_organisms

> Many biologists consider viruses to be non-living because they lack a cellular structure and cannot metabolize by themselves.

Re: Saturn moon 'able to support life'

#217

Earlier quoted context omitted.

I started thinking that another species after us would find it odd that there are so few hydrocarbon deposits - but would they look for something that's not there? Similarly, maybe there's something missing from the Earth that we're just not thinking of because, well, you can't miss something if you never had it.

If we cause a mass extinction, including that of ourselves, wouldn't we be creating a lot of hydrocarbon deposits eventually? (Not asking critically - serious, I have no idea, do billions of people and whatever else we take down with us replenish what we've pulled out of the ground?)

My understanding is that most of them came from plant life, and a lot of that from the ocean - so I don't think the animal biomass would really add that much.

Re: Saturn moon 'able to support life'

#218
post #89

Earlier quoted context omitted.

Here you go: http://www.coolantarctica.com/Antarctica%20fact%20file/scien... Mining wasn't banned until 1991. And as the article outlines, Antarctica is a really, really inhospitable place, to the point that it might be easier to colonize a different planet than to colonize Antarctica (I'd probably prefer equatorial Mars over Antarctica) and even mineral extraction would be very complicated.

At least if you get to Antartica you don't need a pressurized suit and an airlock to go outside. It's difficult to imagine a less hospitable world than one without an atmosphere and a magnetic field (well, not talking about Venus-level inhospitable).

Also the biggest barrier to colonization is transportation. It's much easier to get to Antarctica than it is to Mars. Lots of humans have been to Antarctica. It's unlikely anyone will ever set foot on Mars for the foreseeable future.

Re: Saturn moon 'able to support life'

#219
post #178

I always had this question - Can life exist outside our perception of biological life? Intelligent life might be an anomaly, and rare in the universe - but is it possible that life exists outside our perception of biology? Afterall everything is just rules and actions that lead to predictable reactions (unless quantum physics says something else) I look at artificial life - that exists in virtual environments. It loo…

> I always had this question - Can life exist outside our perception of biological life?

We assume so! But we restrict our scarce looking-for-life resources to conditions where we know life can exist.

Re: Saturn moon 'able to support life'

#220
post #210
post #204

Earlier quoted context omitted.

Critical thinking is the greatest threat to religious indoctrination as it relies on the acceptance of teachings as fact from authorities at face-value without question. If a child learns to be skeptical and questioning, they'll never learn to believe something that can't be supported given the currently available evidence, or may very well be contradicted by it.

Critical thinking is good - but kids can ask questions that are very difficult to answer (but we think of those as common knowledge) For example: This question > Why is 1+0 = 1 and not 10 Attempt to find an answer will generate more questions and it is a journey down the rabbit hole. Sometimes you don't want to do that. And upto high-school I learnt things that were based on assumptions that I kept questioning. Inter…

Because zero is an additive identity. Might as well teach your kid number theory.
Post reply on HN