Donna Shirley: Well, I know, John, at Lake Vostok, one of the big issues is, if we drill into it, our dirty drilling rigs are going to contaminate whatever's down there. William your idea makes sense. What will we be capable of in 2312, or 2412?

If the Neanderthal, Australopithecus, Homo Erectus.

So even with a population density comparable to Earth ~ 14persons/km^2 this comes to living space for about 14 billion people. alone among god’s primates, he kills for sport or lust or greed.

No nothing…Utopia. In order to do this, however, it is necessary to adapt to different extreme environments. ______________________________________.

RSS: https://www.universetoday.com/audio, What Fraser's Watching Playlist: [] Primitive men are said to have evolved into intelligent Homo sapiens, having emerged from the dim-light of caves, in primordial wilds of their early history on Earth ( a little liberal license here ): How ironic, then, would it be, if emissaries of humanity should come to descend like gods from the skies of Mars ( to settle its desolate alien expanses ), in culmination of long epic journey of Scientific and Technological advancement, which saw them rise on pillars of fire, and reach the dazzling heights of interplanetary travel, only to then witness this first adventurous generation of “off-world” representatives born of enlightenment – trek back into the dark interiors of another world’s caves! It is thought that the Borealis basin might have been the result of a huge impact with something. Sorry about that. Clearly if there is life indigenous to Mars we are begging for trouble, which could turn out to be a reversed problem HG Wells penned for the Martians who invaded Earth in his “War of the Worlds.” We may expose ourselves to some biological system or microbes our immune systems have no defenses against, which could even prove devastating for much of life on Earth. I am a 27 years old doctor,mature and beautiful.

To me, that's not that interesting. Many space stations would be better from a transportation point of view, much less expensive, and provide more independent life-supporting homes in case of disaster to Earth. Think about back contamination concerns: an international crew is coming back, and they've found life on Mars, and then they find that maybe they're infected by that life. Mars would be like trying to live in Antartica, and there would be no easy way to heat it up.

So there really is no reason to terraform Mars. That would have been enough to knock the atmosphere off the planet.

For the 1km asteroid blown up this is 5.8km.. For the 10km asteroid this is 58km.

(And a souvenir shop at the base of “Elvis Face Mountain”)http://thecydoniainstitute.com/The-1976-Face-on-Mars.php Think of how long it took the West to get around to getting rid of monarchies and mutual treaties, or how long it took the EU to be created, or how long it took to allow women to vote in much of the West. To these people, I always want to ask, have YOU made a mess of Earth?

But this is more a hope than a certainty. Weird & Wacky, Copyright © 2020 HowStuffWorks, a division of InfoSpace Holdings, LLC, a System1 Company. You missed my point Bill 32805 It needs a moon as big, or in the same proportion as the one orbiting earth, little moons have little effects. So in my opinion, the dome strategy would seem the best route to take. And yet there were still people who were very offended at the idea of us going there and changing it, even though it was nothing but rock. Indeed. If the methane observation is borne out, it would be, to me, the first sign that I really have to rethink this, that maybe there is something living there under the ice. Wouldn’t the eradication of existing Martian life possibly interrupt the natural evolution of that species which might, in millions of years, result in a sentient organism?

This is all related to global warming, so I hope the relevance isn’t unappreciated. I don't actually think we've ruined the Earth. At that point we really are at the end of physics. But it seems the next generation will see a maximum, and thereafter we can have a stabilization at some manageable level.

You might get thumbs up from Doesteyevsky, Camus, Sartre and Heidegger. Of course that is even further into the future, but there are plenty of troublesome spots along the way before then.

If nothing else in the far future the accelerated exponential expansion of the universe means that any such system will have all energy and other resources accelerate away beyond the cosmological horizon and beyond access. Assigning purpose to the universe is a poor basis on which to examine it. Yes, taking a picture of a moon is comparable to building a moon from scratch.

No, it would always be the home of science, some manufacturing and mining and photographers (of beautiful, pristine boulder fields with peach sunsets.)

David Grinspoon: Going to Mars now with robots or even with human expeditions, which is very different from terraforming, is greatly motivated by curiosity, and part of the return from that is we get smarter about how planets work. I think the prospect of Terraforming Mars is now, like so many things have been in the past, still in the realm of science fiction. Well, I vote for life.

Everyone clings to Earth like it’s a giant security blanket, sucking their big thumbs. When we answer that, and if the answer's in the negative, we can then proceed with essentially a dead rock that's very big and really interesting, and bringing life seems the obvious thing to do.

So you can pick out the dead bug bodies. and the vibrations should cause plate tectonics to occur. But I personally think that a Mars full of Martians is much more interesting than Mars full of Earthlings. I never said that billions of people will go to Mars, like a mass exodus. It's going to be a conflictful thing, but in living systems, that's how problems are solved.

Here's everything you need to know about Mars terraformation. If you take a look at any of the missions that are currently planned, they all have international participation, and that counts for everybody's mission. The equal pressure should keep catastrophic failure rates down.

Mars may well be our first step out into the biological universe, it is a step we should take carefully.”.

Small colonies might be fine, but living on Mars should not be at the expense of any native habitats, if they exist.

Look at how badly we're screwing it up.

Robinson’s Mars series is great science fiction. Once you make the decision, then I don't have a job anymore. At each point we need to make these decisions without being able to say right now, "Oh, we should terraform Mars," or, "Oh, we shouldn't terraform Mars."

Mars has no moon, therefore Mars is living a different life than the earth, and trust me planets are alive. Again due to selfish concern, not due to a want to use up the resources.

I go back and forth on this teeter-totter. David Grinspoon: Well, it occurs to me that one of the subtle benefits of the space age is that there is something of a planetary perspective that is spawned from seeing images of the Earth from space.

This type of thing or similar methods could be used to cool Venus, and hence, terraform it. So this was an interesting kind of limit case in environmental ethics, because this sense of what has standing. Light reflected from Neptune’s deep atmosphere is blue, because the atmospheric methane absorbs red and orange light but scatters blue light. But it will be critical to know these things before we attempt to modify the martian environment at all. I think that ultimately, physics will hit the end of the trail during the hunt for understanding, the problem being it will occur short of that goal.

Terra-forming Earth to clean up the mess we created would be a good first experiment to see if we can do it. We're Earth's gonads, and we're about to do what comes natural. I agree we have the ability and should use it if necessary.

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