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If we all wait to start anything in Mars when it is too late for our planet, well... humans won’t be around anymore. Think about Mars as redundancy site for th

• JohnJamesRambo 8y ago
  But our "redundancy site" is awful for human life. Imagine if we just worked on fixing up the place we live on already that has air we can breathe, abundant liquid water, and isn't inundated with deadly radiation. We will need to leave Earth in 5 billion years when the sun goes red giant. 5 billion years is an INCREDIBLE amount of time. Things we do in 2019 will have zero influence on those times. It is much more likely we annihilate ourselves with nuclear weapons or global climate change and pollution way before then. In my opinion, it is better to spend money that would be spent on a silly Mars pipedream to put out those fires first.
  • goshx 8y ago
    > It is much more likely we annihilate ourselves with nuclear weapons or global climate change and pollution way before then That’s the point.
  • trainingaccount 8y ago
    It's actually in about 100 million years as the sun gradually increases in luminosity.
    • isostatic 8y ago
      Ask ten different scientists about the environment, population control, genetics and you'll get ten different answers, but there's one thing every scientist on the planet agrees on. Whether it happens in a hundred years or a thousand years or a million years, eventually our Sun will grow cold and go out. When that happens, it won't just take us. It'll take Marilyn Monroe and Lao-Tzu, Einstein, Morobuto, Buddy Holly, Aristophanes .. and all of this .. all of this was for nothing unless we go to the stars."
    • JohnJamesRambo 8y ago
      I see an estimate for 1% every 110 million years, is that enough to make Earth uninhabitable? Surely not.
      • trainingaccount 8y ago
        Apparently the Earth's orbit places us in the hot end of the inhabitable zone, so only a relatively modest increase in received energy makes us go the way of Venus.
  • stcredzero 8y ago
    Imagine if we just worked on fixing up the place we live on already that has air we can breathe, abundant liquid water, and isn't inundated with deadly radiation. Funny, but extremely high altitudes of the atmosphere of Venus could fit the bill in the context of places in the Solar System. Temperatures and pressures are around room temperature and pressure there. The thick atmosphere of Venus provides some radiation protection, and water can be extracted from the clouds of sulfuric acid droplets there. You couldn't directly breathe the air, but oxygen could be produced in-situ, and bags full of breathable atmosphere would be buoyant, so you could easily suspend cloud cities there just by using the atmosphere inside the environment domes.
    • Something1234 8y ago
      There's this real cool concept about a manned blimp that was produced by NASA a few years ago. It has a really cool video to go with it too. https://www.youtube.com/watch?v=0az7DEwG68A https://www.youtube.com/watch?v=0az7DEwG68A
    • nradov 8y ago
      But without easy access to heavier minerals it would be essentially a dead end, useful as a research base but nothing more.
      • stcredzero 8y ago
        But without easy access to heavier minerals it would be essentially a dead end People who have been thinking about this are way ahead of you. There are plenty of minerals on the surface. We should be able to build remotely piloted mining equipment using phase change materials (like water) to shed heat. To cool the equipment off, we just haul it back to the high altitude base before the phase change material tank runs dry.
  • mellow-lake-day 8y ago
    You can do both. It's not an either-or scenario like you are describing. Also a very tiny amount of people are working on space right now (maybe 500,000 between NASA, SpaceX, Blue Origin, ESA, ISRO, JAXA, etc). That's 0.00625% of the world's population.
• isostatic 8y ago
  What event are you thinking of which will make Earth less hospitable than Mars? Supervolcano? Asteroid?
  • goshx 8y ago
    All those plus climate changes, lunatics in power, etc.
    • simonh 8y ago
      Bioterrorism, rogue Nono-tech, rogue AI, hyper-stable authoritarian government.
      • rapind 8y ago
        Pretty sure we would bring all of this baggage with us to Mars.
        • FeepingCreature 8y ago
          Bioterrorism strongly depends on the incubation period. Probably safe on Mars. Rogue nanotech - not unless it has AI. (Though gray goo is not considered very realistic nowadays, as we've realized just how hard even regular nanotech is, and how hostile the natural environment is to nano-scale mechanisms.) Nuclear war is the big one. Mars colonization would be less about preserving human life, per se, and more about preserving an operational duplicate of the peak state of human civilization.
          • rapind 8y ago
            My opinion is that these are just be symptoms of our social mental state. We're the virus. We need to fix ourselves. Maybe space exploration will help us see a little more long term? Hope so.
    • jetzzz 8y ago
      With all those things, even after nuclear war, Earth is still much better place for life than Mars.
• rictic 8y ago
  It only counts as a redundancy site if the colony could survive without Earth. What's the minimum Martian colony size that's self sufficient? Self sufficient doesn't just mean the ability to create sufficient food, water, air, shelter, sewage, etc but the ability to recreate all of the necessary machinery starting only from your initial supplies and undeveloped Martian natural resources. So many of the industrial processes that we've developed assume a huge interconnected network of supplies. To make Mars self sufficient you'd have to reinvent a huge chunk of the modern industrial system while also trying to keep your small population of colonists from dying. It's a monumental challenge with today's technology.
  • saiya-jin 8y ago
    I agree with you, but this isn't about creating fully working self-sufficient backup in a single go. There needs to be a first step, and then another, and so on. We will learn great deal from it, be it IT technology, materials, physics but also about us - psychology, physiology etc.