Cancer Posted May 16, 2008 Report Share Posted May 16, 2008 Re: Longest Running Thread EVER Day after the mid-term in 101, it's the first sunny weekday this spring here in Seattle, and I feel like the old Deep Purple song: "No one came from miles around." Only a dozen out of 44 show up for class. So we went down and sat in the shade in the Quad and I talked about why Venus is different from Earth (and why Earth will look like Venus in time) and told them a question that's certain to appear on the final. Oh, I took attendance too. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 16, 2008 Report Share Posted May 16, 2008 Re: Longest Running Thread EVER Heh. I always liked the first nice, warm day at UMF, for that very reason. All the cool teachers would find an excuse to take us outside. "Warm" in Maine, by the way, is mid-60's, with a chilly breeze, and all the snow has finally melted. But it's a nice change. It goes from Effing Cold to Effing Hot pretty quickly, though. That took some adjustment. Quote Link to comment Share on other sites More sharing options...
SteveZilla Posted May 17, 2008 Report Share Posted May 17, 2008 Re: Longest Running Thread EVER Day after the mid-term in 101' date=' it's the first sunny weekday this spring here in Seattle, and I feel like the old Deep Purple song: "No one came from miles around." Only a dozen out of 44 show up for class. So we went down and sat in the shade in the Quad and I talked about why Venus is different from Earth (and why Earth will look like Venus in time) and told them a question that's certain to appear on the final. Oh, I took attendance too.[/quote'] When you say "look like", what do you mean? I can't ever see the atmospheric density for Earth ever approaching that of Venus, not to mention the acidity level. So what was the question? Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 17, 2008 Report Share Posted May 17, 2008 Re: Longest Running Thread EVER When you say "look like", what do you mean? I can't ever see the atmospheric density for Earth ever approaching that of Venus, not to mention the acidity level. So what was the question? The question was: why does Venus have extra-dimensional intelligence and how humans on Earth will evolve to that level. :even more sneaky: Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 17, 2008 Report Share Posted May 17, 2008 Re: Longest Running Thread EVER When you say "look like"' date=' what do you mean? I can't ever see the atmospheric density for Earth ever approaching that of Venus, not to mention the acidity level. [/quote'] If (in no particular order) you take the planetary CO2 inventory, turn all the water to vapor and get rid of the "cold trap" at the stratosphere, so that UV can get to it, photodissociate it and have the hydrogen escape so the water is destroyed ... then there's also likely to be large-scale changes in the crustal rocks and massive volcanism. Then you've got ... something a lot like Venus. Thing is, evolution of the Sun, with its inexorably increasing luminosity, is almost certain to this ... albeit in a billion years or so. So what was the question? How the greenhouse effect works, in something slightly above brain-dead level terms. Quote Link to comment Share on other sites More sharing options...
SatinKitty Posted May 18, 2008 Report Share Posted May 18, 2008 Re: Longest Running Thread EVER Do you believe in Humans having an effect on natural global warming ? Quote Link to comment Share on other sites More sharing options...
SteveZilla Posted May 18, 2008 Report Share Posted May 18, 2008 Re: Longest Running Thread EVER In practicle terms, no, I don't belive that. From what I can tell the human contribution to global warming is next to nill when compared to what goes on in nature. For example: http://www.geocraft.com/WVFossils/greenhouse_data.html Quote Link to comment Share on other sites More sharing options...
SteveZilla Posted May 18, 2008 Report Share Posted May 18, 2008 Re: Longest Running Thread EVER If (in no particular order) you take the planetary CO2 inventory, turn all the water to vapor and get rid of the "cold trap" at the stratosphere, so that UV can get to it, photodissociate it and have the hydrogen escape so the water is destroyed ... then there's also likely to be large-scale changes in the crustal rocks and massive volcanism. Then you've got ... something a lot like Venus. Thing is, evolution of the Sun, with its inexorably increasing luminosity, is almost certain to this ... albeit in a billion years or so. So the "Solar Constant"... is not truly constant. And not to mention the pending Red Giant stage our sun will likely go though will roast The Earth like a hamburger on a hibachi (American usage). Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 18, 2008 Report Share Posted May 18, 2008 Re: Longest Running Thread EVER So the "Solar Constant"... is not truly constant. Exactly. And not to mention the pending Red Giant stage our sun will likely go though will roast The Earth like a hamburger on a hibachi (American usage). Whether it'll actually work that way goes back & forth. Earth is right on the hairy edge. The most recent work suggests yes, the Earth will be engulfed and destroyed. The opposite conclusion held for 6-8 years before that. And before that, that was the leading opinion. It depends on several parts of stellar physics that are poorly known and/or very difficult to compute. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted May 18, 2008 Report Share Posted May 18, 2008 Re: Longest Running Thread EVER . . . Just got back from Norrland's Kendo Open in Luleå. Had a very good time -- the club won four out of five classes, and in the class we lost we got a silver. And I did my best kendo ever! Sempai Erik, he sez; "Wrong? You did nothing wrong!" Next time I will do it even better. Yay us! ^^ Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Exactly. Whether it'll actually work that way goes back & forth. Earth is right on the hairy edge. The most recent work suggests yes, the Earth will be engulfed and destroyed. The opposite conclusion held for 6-8 years before that. And before that, that was the leading opinion. It depends on several parts of stellar physics that are poorly known and/or very difficult to compute. Most theories I've heard on the subject say that humans will be long extinct by that point. We're talking millions, maybe billions of years. Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Possibly. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER I'd say likely, as most other species haven't lasted a fraction of that time. Even if humans do exist, they likely won't be as we know them today. I sometimes like to think what the next evolution of humanity might be like. When I'm in a good mood, anyway; when I'm feeling particularly cynical, it's an exercise in further cynicism. Quote Link to comment Share on other sites More sharing options...
Bazza Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER I sometimes like to think what the next evolution of humanity might be like. Quote Link to comment Share on other sites More sharing options...
SteveZilla Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Whether it'll actually work that way goes back & forth. Earth is right on the hairy edge. The most recent work suggests yes' date=' the Earth will be engulfed and destroyed. The opposite conclusion held for 6-8 years before that. And before that, that was the leading opinion. It depends on several parts of stellar physics that are poorly known and/or very difficult to compute.[/quote'] Oh, I wasn't talking about actual engulfment. I would think just being within several hundred thousand miles of the photosphere (if not *in* it) would be bad enough. Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Most theories I've heard on the subject say that humans will be long extinct by that point. We're talking millions' date=' maybe billions of years.[/quote'] Well, yeah. It pays to recall in this context that metazoans ... multicelled life of any sort ... have only existed for about 700 million years. The sterilization of Earth via the solar luminosity increase / boil oceans / global volcanism process is about a billion years off. And the engulfing of Earth by the solar photosphere is about 5-6 billion years away. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Yep. So I don't stay up at night worrying about it. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER . . . You don't? I thought everyone did. Is it just me? Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER I do stay up at night worrying, but I usually find more pressing things to obsess about. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER . . . I usually take the long view. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Must be nice to have so few pressing matters weighing one down. Quote Link to comment Share on other sites More sharing options...
L. Marcus Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Oh, those I just ignore. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Oh. Well, then, that's okay. Quote Link to comment Share on other sites More sharing options...
Cancer Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER It's called delegation of responsibility. Quote Link to comment Share on other sites More sharing options...
AliceTheOwl Posted May 19, 2008 Report Share Posted May 19, 2008 Re: Longest Running Thread EVER Uh-oh. There's that R-word. Quote Link to comment Share on other sites More sharing options...
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