That's another thing in the category of 'probably not that bad'. Life survived on Earth without a magnetic field for a long period of time. A thicker atmosphere on Mars would present a fair barrier to high energy particles and Mars is further out so overall less intense.
Though tectonics and the magnetic field are two different things.
The magnetic field is believed to be produced by the spinning of an iron core within the center of the planet, why Mars lost it's field is unknown.
I think the fact that Mars lost its magnetic field due to solidifiction of its core is well understood.
I'll ask my geology professor when he shows up for class in 15 minutes.
What I believe is less well understood is why Earth's core became so hot in such a sustained fashion. Mars core cooling is, I believe, the predicted outcome, while Earths core is the anomaly.
I think the fact that Mars lost its magnetic field due to solidifiction of its core is well understood.
I'll ask my geology professor when he shows up for class in 15 minutes.
What I believe is less well understood is why Earth's core became so hot in such a sustained fashion. Mars core cooling is, I believe, the predicted outcome, while Earths core is the anomaly.
higher concentrations of radioactive materials within the crust/core.
That's another thing in the category of 'probably not that bad'. Life survived on Earth without a magnetic field for a long period of time. A thicker atmosphere on Mars would present a fair barrier to high energy particles and Mars is further out so overall less intense.
Yeah, but it was microbial life on the bottom of an ocean. Life didn't really expand until the earth developed an ozone layer.
The surface of mars get about 0.64 millisieverts of radiation per day which is quite close to the evacuation zone around Fukushima reactor. You won't die right away but the cumulative radiation is really bad for any life forms that want to live there. So... giant roaches?
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That's another thing in the category of 'probably not that bad'. Life survived on Earth without a magnetic field for a long period of time. A thicker atmosphere on Mars would present a fair barrier to high energy particles and Mars is further out so overall less intense.
Yeah, but it was microbial life on the bottom of an ocean. Life didn't really expand until the earth developed an ozone layer.
The surface of mars get about 0.64 millisieverts of radiation per day which is quite close to the evacuation zone around Fukushima reactor. You won't die right away but the cumulative radiation is really bad for any life forms that want to live there. So... giant roaches?
That's another thing in the category of 'probably not that bad'. Life survived on Earth without a magnetic field for a long period of time. A thicker atmosphere on Mars would present a fair barrier to high energy particles and Mars is further out so overall less intense.
Yeah, but it was microbial life on the bottom of an ocean. Life didn't really expand until the earth developed an ozone layer.
The surface of mars get about 0.64 millisieverts of radiation per day which is quite close to the evacuation zone around Fukushima reactor. You won't die right away but the cumulative radiation is really bad for any life forms that want to live there. So... giant roaches?
lead roof
Heck, if we're mining asteroids by that point; gold roof.
I think the fact that Mars lost its magnetic field due to solidifiction of its core is well understood.
I'll ask my geology professor when he shows up for class in 15 minutes.
What I believe is less well understood is why Earth's core became so hot in such a sustained fashion. Mars core cooling is, I believe, the predicted outcome, while Earths core is the anomaly.
higher concentrations of radioactive materials within the crust/core.
i think
Earth also has a proportionally larger core from its impact with Theia.
As super-sciencey as terraforming mars would be. Yeah -- the 'real' problem is the solar wind would just scour anything we put there.
Over a vastly longer time span than even terraforming, though. It just means your terraforming effort needs to be maintained, which is...no different than anything humans build. The Earth is a fairly hostile environment in a lot of ways, after all.
The real problem with terraforming Mars is there's no point; if you have the technology necessary to put that much effort into another planet, you can just build an O'Neill cylinder.
Right, but how do we know that Theia's had a hot core? And how would that be different than any other planet that formed. Or was it the actual impact itself that created the heat energy?
"Simple, real stupidity beats artificial intelligence every time." -Mustrum Ridcully in Terry Pratchett's Hogfather p. 142 (HarperPrism 1996)
I think the fact that Mars lost its magnetic field due to solidifiction of its core is well understood.
I'll ask my geology professor when he shows up for class in 15 minutes.
What I believe is less well understood is why Earth's core became so hot in such a sustained fashion. Mars core cooling is, I believe, the predicted outcome, while Earths core is the anomaly.
higher concentrations of radioactive materials within the crust/core.
i think
Right, right I remember now. Early attempts to measure the age of the earty scientificlly by calculating cooling rates were way low because no one knew bout radioactivity yet.
I love this phone, with its occasionally working a key
Right, but how do we know that Theia's had a hot core? And how would that be different than any other planet that formed. Or was it the actual impact itself that created the heat energy?
All planets were hot when they formed. Some aren't still because they cooled off.
Right, but how do we know that Theia's had a hot core? And how would that be different than any other planet that formed. Or was it the actual impact itself that created the heat energy?
We don't know that Thea would have had a hot core, though it's a very high probabality that it would have due to the relatively young age of the solar system at the time of the collision.
A glancing blow sufficient to destroy Thea, leave the young Earth intact, and eventually lead to the formation of the Moon would have been an extremely energetic event. That, along with the added material of Thea that sunk into Earth's core is probably the major source of the additional heat that has kept Earth's core molten.
so im sure you guys have heard about the comet landing and such. that's so fucking cool. like moon landing worthy of cool.
what's not cool was that it was a 5minute blurb on HLN sandwiched between two 15minute blurbs of the rising tensions in ukraine and ISIS tricking US teens into joining them via social media like twitter and facebook.
The other thing I'm irked about is watching the comradarie between the Russian, NASA, and ESA astronauts working on the ISS and all of the bro-ness between these people as they do work and experiments and EVAs and then I flip to CNN, FOX, take your pick one sided news agency, and its all rising tensions bullshit between USA and Russia again.
If there is one thing that space exploration will do is be able to let me get off this rock and claim my own little piece of rock for myself.
so im sure you guys have heard about the comet landing and such. that's so fucking cool. like moon landing worthy of cool.
what's not cool was that it was a 5minute blurb on HLN sandwiched between two 15minute blurbs of the rising tensions in ukraine and ISIS tricking US teens into joining them via social media like twitter and facebook.
The other thing I'm irked about is watching the comradarie between the Russian, NASA, and ESA astronauts working on the ISS and all of the bro-ness between these people as they do work and experiments and EVAs and then I flip to CNN, FOX, take your pick one sided news agency, and its all rising tensions bullshit between USA and Russia again.
If there is one thing that space exploration will do is be able to let me get off this rock and claim my own little piece of rock for myself.
Yeah, like, if I live to see brain uploading
I'm stealing a rocket and getting the heck out of here
The thing about brain uploading is similar to cryogenics.
Why would anyone upload your brain (or mine).
Glance at any random person's twitter feed and tell me that there is any value in preserving the brain that spawned that.
Likewise, why the hell would future humans want to thaw you (or me) out? Assuming that they have evolved ethically as well as in other respects, they are not going to wake you up just to dissect you or put you in a petting zoo, but they sure as hell don't want to hang out with you either, you unevolved 21st century barbarian.
The thing about brain uploading is similar to cryogenics.
Why would anyone upload your brain (or mine).
Glance at any random person's twitter feed and tell me that there is any value in preserving the brain that spawned that.
Likewise, why the hell would future humans want to thaw you (or me) out? Assuming that they have evolved ethically as well as in other respects, they are not going to wake you up just to dissect you or put you in a petting zoo, but they sure as hell don't want to hang out with you either, you unevolved 21st century barbarian.
Its science fantasy.
Because despite the personality flaws a human brain is one hell of a computing tool.
I mean.
worst case scenario I suppose?
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Oh wait, you're talking upload.
I'm talking freaky upgrade brain floating in a jar.
The thing about brain uploading is similar to cryogenics.
Why would anyone upload your brain (or mine).
Glance at any random person's twitter feed and tell me that there is any value in preserving the brain that spawned that.
Likewise, why the hell would future humans want to thaw you (or me) out? Assuming that they have evolved ethically as well as in other respects, they are not going to wake you up just to dissect you or put you in a petting zoo, but they sure as hell don't want to hang out with you either, you unevolved 21st century barbarian.
Its science fantasy.
in the future, the after effects of a virus have left all men sterile so they thaw all the men out to repopulate the earth once all of the sperm banks run dry.
I'm talking freaky upgrade brain floating in a jar.
Why a jar?
I mean, if I had my brain pulled out and crammed into something else, it might involve a jar, but that jar would be enclosed in something that would allow me to settle debates by throwing 18-wheelers at my opponents.
The thing about brain uploading is similar to cryogenics.
Why would anyone upload your brain (or mine).
Glance at any random person's twitter feed and tell me that there is any value in preserving the brain that spawned that.
Likewise, why the hell would future humans want to thaw you (or me) out? Assuming that they have evolved ethically as well as in other respects, they are not going to wake you up just to dissect you or put you in a petting zoo, but they sure as hell don't want to hang out with you either, you unevolved 21st century barbarian.
Its science fantasy.
Probably the same reason that if we had a peasant from the 1300s that we could resuscitate, we would be all over asking them questions. And probably causing insanity by exposing them to our hypermodern world.
Of course, if we had like 10,000,000 frozen Medieval peasants sitting around, it's probably less likely the incentive to thaw them out would be there.
Wouldn't the more immediate issue be the constant bombardment of solar radiation?
Yes and no. You've got lots of it, current surface levels look like nuclear reactor accidents, it's generally bad for you. Current levels don't include an atmosphere though, so they'll fall once you put that in place. Also, you did make a several month trip over there in a tin can at higher radiation levels, so presumably this is actually a solved problem. You might not get to wander around the surface in a t-shirt, but the radiation isn't going to be the thing that stops you from living on mars (it just stops you from going outside frequently).
As super-sciencey as terraforming mars would be. Yeah -- the 'real' problem is the solar wind would just scour anything we put there.
Over a vastly longer time span than even terraforming, though. It just means your terraforming effort needs to be maintained, which is...no different than anything humans build. The Earth is a fairly hostile environment in a lot of ways, after all.
The real problem with terraforming Mars is there's no point; if you have the technology necessary to put that much effort into another planet, you can just build an O'Neill cylinder.
Really? I thought the terraforming Mars was akin to most astro-engineering challenges in that it's mostly down to persuading someone to give you an unreasonable number of nukes.
Plus the methods being a lot cruder than maintaining a space colony, and the size of the planet making it a bit more stable once you've got it up and running.
perhaps I'm oversimplifying
but a plan for making a place habitable that involves "persuading someone to give you an unreasonable number of nukes"
prolly isn't the best plan
I know I'm a bit late to the party here, but that Discovery Channel Infographic about terraforming Mars isn't saying it is $1.5 trillion to perform the project, that's just the last step. The entire process as laid out there is $3.9 trillion over 480 years. Certainly a thing that we could do at those numbers, but as a species we're kind of bad at long term thinking so it seems unlikely we would do it. It's much more likely that we make habitats out of asteroids or something else.
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chair to Creation and then suplex the Void.
That's another thing in the category of 'probably not that bad'. Life survived on Earth without a magnetic field for a long period of time. A thicker atmosphere on Mars would present a fair barrier to high energy particles and Mars is further out so overall less intense.
In 2012 UCLA discovered the presence of plate tectonics on Mars.
Though tectonics and the magnetic field are two different things.
The magnetic field is believed to be produced by the spinning of an iron core within the center of the planet, why Mars lost it's field is unknown.
I'll ask my geology professor when he shows up for class in 15 minutes.
What I believe is less well understood is why Earth's core became so hot in such a sustained fashion. Mars core cooling is, I believe, the predicted outcome, while Earths core is the anomaly.
higher concentrations of radioactive materials within the crust/core.
i think
Yeah, but it was microbial life on the bottom of an ocean. Life didn't really expand until the earth developed an ozone layer.
The surface of mars get about 0.64 millisieverts of radiation per day which is quite close to the evacuation zone around Fukushima reactor. You won't die right away but the cumulative radiation is really bad for any life forms that want to live there. So... giant roaches?
lead roof
Heck, if we're mining asteroids by that point; gold roof.
Earth also has a proportionally larger core from its impact with Theia.
The two planets collided, with debris from the mantle eventually forming the Moon and Theia's core merging with ours.
http://en.wikipedia.org/wiki/Giant_impact_hypothesis
Critical Failures - Havenhold Campaign • August St. Cloud (Human Ranger)
While earth was molten all the heavier stuff sunk to the core. Including material added in collisions.
Over a vastly longer time span than even terraforming, though. It just means your terraforming effort needs to be maintained, which is...no different than anything humans build. The Earth is a fairly hostile environment in a lot of ways, after all.
The real problem with terraforming Mars is there's no point; if you have the technology necessary to put that much effort into another planet, you can just build an O'Neill cylinder.
Right, but how do we know that Theia's had a hot core? And how would that be different than any other planet that formed. Or was it the actual impact itself that created the heat energy?
Right, right I remember now. Early attempts to measure the age of the earty scientificlly by calculating cooling rates were way low because no one knew bout radioactivity yet.
I love this phone, with its occasionally working a key
All planets were hot when they formed. Some aren't still because they cooled off.
We don't know that Thea would have had a hot core, though it's a very high probabality that it would have due to the relatively young age of the solar system at the time of the collision.
A glancing blow sufficient to destroy Thea, leave the young Earth intact, and eventually lead to the formation of the Moon would have been an extremely energetic event. That, along with the added material of Thea that sunk into Earth's core is probably the major source of the additional heat that has kept Earth's core molten.
what's not cool was that it was a 5minute blurb on HLN sandwiched between two 15minute blurbs of the rising tensions in ukraine and ISIS tricking US teens into joining them via social media like twitter and facebook.
The other thing I'm irked about is watching the comradarie between the Russian, NASA, and ESA astronauts working on the ISS and all of the bro-ness between these people as they do work and experiments and EVAs and then I flip to CNN, FOX, take your pick one sided news agency, and its all rising tensions bullshit between USA and Russia again.
If there is one thing that space exploration will do is be able to let me get off this rock and claim my own little piece of rock for myself.
Steam - NotoriusBEN | Uplay - notoriusben | Xbox,Windows Live - ThatBEN
Steam - NotoriusBEN | Uplay - notoriusben | Xbox,Windows Live - ThatBEN
I'm stealing a rocket and getting the heck out of here
Why would anyone upload your brain (or mine).
Glance at any random person's twitter feed and tell me that there is any value in preserving the brain that spawned that.
Likewise, why the hell would future humans want to thaw you (or me) out? Assuming that they have evolved ethically as well as in other respects, they are not going to wake you up just to dissect you or put you in a petting zoo, but they sure as hell don't want to hang out with you either, you unevolved 21st century barbarian.
Its science fantasy.
Because despite the personality flaws a human brain is one hell of a computing tool.
I mean.
worst case scenario I suppose?
I'm talking freaky upgrade brain floating in a jar.
Steam - NotoriusBEN | Uplay - notoriusben | Xbox,Windows Live - ThatBEN
in the future, the after effects of a virus have left all men sterile so they thaw all the men out to repopulate the earth once all of the sperm banks run dry.
clearly not science fantasy.
Why a jar?
I mean, if I had my brain pulled out and crammed into something else, it might involve a jar, but that jar would be enclosed in something that would allow me to settle debates by throwing 18-wheelers at my opponents.
Probably the same reason that if we had a peasant from the 1300s that we could resuscitate, we would be all over asking them questions. And probably causing insanity by exposing them to our hypermodern world.
Of course, if we had like 10,000,000 frozen Medieval peasants sitting around, it's probably less likely the incentive to thaw them out would be there.
I'd make a good AI like thing and I probably wouldn't go too crazy.
Really? I thought the terraforming Mars was akin to most astro-engineering challenges in that it's mostly down to persuading someone to give you an unreasonable number of nukes.
Plus the methods being a lot cruder than maintaining a space colony, and the size of the planet making it a bit more stable once you've got it up and running.
but a plan for making a place habitable that involves "persuading someone to give you an unreasonable number of nukes"
prolly isn't the best plan
Would be frickin' awesome though.