How We Will Build An Underground Civilization On Mars!

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  • Опубліковано 7 чер 2024
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    How We Will Live In An Underground Mars Colony!
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  • Наука та технологія

КОМЕНТАРІ • 985

  • @TheSpaceRaceYT
    @TheSpaceRaceYT  Рік тому +21

    The first 100 people to use code SPACE at the link below will get 20% off of Incogni: incogni.com/space

    • @hottuesdays
      @hottuesdays Рік тому +2

      Habitats underneath the Marsian surface sound like a much more reasonable plan than these fancy glass domes.

    • @rebecavillanova7622
      @rebecavillanova7622 Рік тому +1

      All this is beautiful but what I don't understand, we got plenty of desert regions on earth that are very similar to average Mars condition, but no one try to create a base there.
      If humans cannot create a village in the middle of the Sahara, where they can experiment without fear of oxygen problems and still on earth, saving money.
      If musk is serious about this, he should build bases in every cold,hot deserts on earth, even Antarctica to simulate all Mars.

    • @Metal0sopher
      @Metal0sopher Рік тому

      Anyone did the math on the amount of energy, materials, and labor required to transfer all that material from earth to Mars, and operate it there? I'm curious about the cost. Even if spaceX builds rockets to get to Mars and back, I don't think they have the money to build anything close to this. This project is all cost with ZERO profit. Projects this big, right here on Earth, cost billions but are viable because they are profitable, directly or indirectly like infrastructure in 20 to 30 years. This concept has ZERO profitability, only an extreme expense to build and likely even more expensive to maintain. This it will never exist, other than as a temporary and failed "art project" by a billionaire who will lose his shirt and lots of dead people trying.

    • @rebecavillanova7622
      @rebecavillanova7622 Рік тому

      @@Metal0sopher Have you heard of 3D printing?
      Am not saying that 3D printing is read at that scale but things are evolving rapidly.
      For example, mental 3D and printed circuit board is advanced now.
      Once robots can be autonomous on Mars and divers 3D printers available, we wouldn't need to be worried about transporting materials, but I still think it will take at least 50 years before we even started.

    • @rolflandale2565
      @rolflandale2565 Рік тому

      Predominantly underground is feasible. bubble domes can super radiation & thermal tint, even crops plants/trees can be photosynthesis transfer from external solar 🔋 to internal halogen lamp🔦 , sustaining naturally o2 & vapor recycle♻️ H20.
      Elon is correct in nuking, (more like erupting lava & ice really) to tarriform...BUT! The magnetospher will *not hold the atmosphere* for long, The Earth spews 2%+ annually out to space, the core multiplictis it more than its *efficient size* core compress energy it bares to cycle life.
      Gravity is a issue to your third generation on Mars/moon. Morph body form, likely hunch-back/tail & giant able growth versus low *grip* ratio mass mobility. ( The way Earth was at one time of its eons of reincarnation form. 🦕👀?!).

  • @michaelschuette1743
    @michaelschuette1743 Рік тому +140

    The cave idea overall is probably the best bet. All of the conditions above surface will take along time to make habitable.

    • @raymondclark1785
      @raymondclark1785 Рік тому +2

      He comments about using the caves and then mentions meteors punching thru into them :(

    • @solifugus
      @solifugus Рік тому +4

      Frankly, I like Mars the way it is on the surface. I wouldn't terraform it. If you are going to go cave, then I strongly suggest ice caves in the massive tropical glaciers (2+ kilometers deep). You need an airlock on the surface and can otherwise melt out as big a city as you like. It would keep pressure and reasonable room temperatures. Using an insulative membrane, you could increase the temperature for grow rooms that want even warmer temperatures for the best productivity. You could also use an insulative membrane to build a heating indoor swimming pool. You can sculpt stairs, statues, tables, chairs, beds, sofas, plates, and cups from ice. Since these glaciers are huge and not longer moving, they'd be extremely stable and safe.

    • @rolflandale2565
      @rolflandale2565 Рік тому

      It isn't necessary to dwell in caves, bubble domes can be super radiation & thermal tinted, even crops plants/trees can be photosynthesis transfer from external solar to internal halogen lamps, sustaining naturally o2 & vapor of H20. Gravity is a issue to your third generation. Morph body form likely hunch-back/tail & giant able growth vs low *grip* mass. ( The way Earth was at one time of its eons of reincarnation form 🦕👀).

    • @thebobloblawshow8832
      @thebobloblawshow8832 Рік тому +1

      Can they create an atmosphere dense enough for us with what’s available to them.

    • @bhaskard8405
      @bhaskard8405 Рік тому +2

      very long time or Never.

  • @michaelsparks6084
    @michaelsparks6084 Рік тому +51

    Lava tubes are something I have been advocating for from the start. It makes the most sense, along with Small Modular Nuclear power Plants.

    • @solifugus
      @solifugus 10 місяців тому +3

      Lava tubes are good but will take a bit to enter and prepare. Simply melting a palace out for your colony in a glacier would be faster and easier.

    • @michaelsparks8632
      @michaelsparks8632 10 місяців тому

      @@solifugus interesting, never considered that approach.
      I agree, absolute top option!

    • @deanlawson6880
      @deanlawson6880 6 місяців тому +1

      Yes definitely, small modular nuclear powerplants for power for the colony! Scale up and expand and add power capacity as needed as the colony grows!

    • @mnegreiff
      @mnegreiff Місяць тому

      Martians already have power stations there. From what I can see they are bring power to the surface using Crescent Moon shaped structures.

  • @coreyb2923
    @coreyb2923 Рік тому +101

    Would totally live in an underground city on Mars .
    I've designed many in my spare time. But was impressed by the the underground city on Ceres in the Expanse.

    • @Boblw56
      @Boblw56 Рік тому +10

      Can’t wait for you to go! Leave now!

    • @The1stDukeDroklar
      @The1stDukeDroklar Рік тому +4

      Why though? That could be built anywhere on Earth and be much closer to help if needed. It also wouldn;t be as lethal to life as Mars.

    • @ncp8925A
      @ncp8925A Рік тому

      Oye beltaloda

    • @joshw3090
      @joshw3090 Рік тому +5

      It's not the earth that's the problem, it's the world 🌍

    • @Tron-Jockey
      @Tron-Jockey Рік тому +6

      Living in a cave would get old very fast. You cannot take humans millions of miles away from earth, put them in a cave and not expect a certain percent of them to exhibit serious psychological issues with a few months. You'd have to expect this even among the initially more enthusiastic space travelers. While this may be necessary initially it simply cannot be a permanent solution. There needs to be better ideas for creating a suitable living environment that's at least partially on the surface. I envision employing moderate size craters that are less than a kilometer across, deep and symmetrical. These would have some sort of translucent dome or cover. The crater would of course offer protection from radiation from underneath and depending upon depth, offer significant protection from the sides. The domes could be made largely of something similar to Pycrete albeit with Mars regolith rather than sawdust (Mars-crete?). Once the dome was complete it would then be perforated to create windows of 20 to 50 feet in diameter which would then be plugged with frozen water. The Mars-crete and frozen water would provide the protection from radiation. Under these domed craters could be access to the caverns, lava tubes and other underground areas.

  • @Matthew.Sirrom
    @Matthew.Sirrom Рік тому +159

    Let's hope these caves are empty and don't have any little critters to mess us up.

    • @alengrm7488
      @alengrm7488 Рік тому +14

      Maybe even a whole civilization

    • @bsmusic2601
      @bsmusic2601 Рік тому +3

      Lol

    • @rebecavillanova7622
      @rebecavillanova7622 Рік тому +15

      @@alengrm7488 Am not sure those hidden civilizations appreciate home invasion by humans drilling down from their roof 😂.
      The first encounter might be the last encounter very quickly.

    • @IvanPlayStation4LiFe
      @IvanPlayStation4LiFe Рік тому

      Lets hope they have something alive

    • @niverian7789
      @niverian7789 Рік тому +11

      If that is the case, we must ask would that in turn make us the alien invaders. More to the point, would that put us in a completely reverse of War of the Worlds? Alot of ethical quandries to consider and moreover to ask are we better than out ancestors and potentially seek cooperation with the natives, or will we be no better than the European settlers and displace their population. More to the point, what diseases would be swapped around? Would we develop an immunity to said disease or would it be mutually assured death by cross contamination.

  • @shadowforgedgamerz520
    @shadowforgedgamerz520 Рік тому +8

    I'm pulling for both habitats... Here's why. Underground cities will help to stabilize growth for our species, however, eventually we're going to need to develop not only hard shielding, but energy based shielding to expand onto the surface of Mars. Having many eyes and ears above ground on a daily basis will help us to keep tabs on the "Pulse" of the planet and foresee any dangers we're currently not seeing from our satellites, rovers, and probes. I truly, absolutely envy those who get to go and colonize Mars first.... I'm too old to physically make it off the planet now to go there, unless we come up with a ant-gravity way of leaving our surface here... it's physically too demanding, however, I've dreamed of going into space and reaching for the stars for literal decades. Maybe one of my grandchildren will go there. Now THAT would be exciting!

  • @antonnym214
    @antonnym214 Рік тому +50

    For me, a good place to reside is in the western end of Valles Marineris, in the canyon, at the base of one of the walls where it will have relative abundance of atmosphere above it and good protection from meteorites and cosmic rays. Additionally, we could bore into the cliffs and have part of our infrastructure in the ground in that manner. All good wishes.

    • @markg.7865
      @markg.7865 Рік тому +1

      We can't afford to bury power lines underground here, infrastructure on Mars is pipedream.

    • @davidpage7900
      @davidpage7900 10 місяців тому +2

      I like your thoughts. Plus, the ground is surely a better thermal inulator than some city of glass or a space baloon would be!

    • @romeufrancisco7041
      @romeufrancisco7041 5 місяців тому

      That region has a network of deep canions that may have still some water close to the surface, judging by recent reports.

  • @robertheidler5315
    @robertheidler5315 Рік тому +21

    Do the caves! Surface domes are too fragile, and martian lava tubes can be huge!

  • @andrewjones3968
    @andrewjones3968 Рік тому +19

    The caves are our best option. No matter what we do to make a habitable surface colony, one meteor hit and it’s over

    • @MrSatyre1
      @MrSatyre1 Рік тому +5

      You'd have to go pretty far down to be impervious to meteors. Might be better to dig horizontally into a mountain or extinct volcano base.

    • @seekingsecurity
      @seekingsecurity Рік тому +2

      @@MrSatyre1 To be safe from meteors or asteroids, but those threaten us here on earth as well and we seem to cope.
      It's the meteroids that are the big deal, cause those hit earth all day every day but burn up quick and never pose a threat. Those would be an issue on mars, but that could be mitigated by going a little ways under ground

  • @D_Rogers
    @D_Rogers Рік тому +24

    Keeping that dust at bay is an under-rated issue! :)
    The problem with glass domes, is that you need to build your landing pads miles away, or behind a ridge, to protect the dome..
    There is a short list of things humans need surface access for, mostly working, surface travel, and arriving/leaving via landing pads...
    Time spent on the surface is like time spent getting X-rayed or flying long haul, you would need to track your radiation exposure.

    • @MikeWiggins1235711
      @MikeWiggins1235711 Рік тому +2

      My Own Creations: Agreed. Another issue with the glass domes will be the same as it has been with all our Rovers on Mars: keeping them clean!

  • @Lilmiket1000
    @Lilmiket1000 Рік тому +11

    Lmao that shot of the eyes exploding from total recall is a major classic lmao It always makes me laugh so hard!

  • @59seank
    @59seank Рік тому +18

    I would not want to live in a cave. I like fresh air and feeling of the sun on my skin. I like seeing green plants and trees. I like watching the rain and snow. Hearing the owls and coyotes singing.

    • @Thurmanism
      @Thurmanism Рік тому +4

      Who asked bro??

    • @darkmunkynutz
      @darkmunkynutz Рік тому +4

      Good for you

    • @mihaidragnea9785
      @mihaidragnea9785 Рік тому +4

      Living on the surface of mars would be the same or even worse than underground. This is what living in a hostile environment is like. Elon Musk is overhyping our current technological advances, a "colony" on mars will look much more like a research base on Antartica.

    • @rebelman7837
      @rebelman7837 Рік тому +5

      Y’all are talking about how hostile it is but some people which aren’t you may like living and having that lifestyle. Those will be the first colonizers before it’s terraformed

    • @ultimateanthony1883
      @ultimateanthony1883 Рік тому +3

      Better go into the woods and never come out 🤫😆😁😆😁💯

  • @tucker8594
    @tucker8594 Рік тому +12

    Existing lava tubes and caves are the best first option...then send in the Boring Company to connect everything

  • @happy.in.philippines757
    @happy.in.philippines757 Рік тому +14

    I would think 90% underground and 10% above ground (shielded from radiation by regolith or water) would be best. Underground habitats need to be expansively large to contain enough breathable air that a breach can be sealed before oxygen levels get dangerously low. Plants and trees, even forests and parks in all underground living areas will be needed to produce oxygen and ensure the mental health of the inhabitants. The choice between living in a concrete and steel bunker vs a large natural looking environment should be an obvious one. Cabin fever would be the outcome for the former.

  • @gravelydon7072
    @gravelydon7072 Рік тому +13

    A combination of both would be needed. The caves for most things and domes for food production. Domes do not have to be big and could have covers that could go over them for major events to protect them. The main problem is going to be the dust. The caves could house tubes that would be like structures that were built in Greenland during the Cold War. They could have airlocks for going outside into the caves so the caves themselves would not need to be air tight. Insulating the structures inside the caves would be easier than insulating the whole cave.

    • @marktwain2053
      @marktwain2053 Рік тому +1

      Ever heard of grow lights?

    • @trojanhorse6029
      @trojanhorse6029 4 місяці тому

      @@marktwain2053 I never understood why hydroponics or aquaponics are not considered as a reliable source of food. Once, just for laughs I grew a chilli plant and some tomatoes using some $20 expensive high grade plant food. The chilli plant was ridiculous, some much yield. The tomatoes were the same, thirsty but they just super fast and super big. I only had a single 600w light too.

  • @eovarendre7877
    @eovarendre7877 Рік тому +8

    Caves for sure! Surface domes are too vulnerable. In KSR Mars trilogy, humans start by putting containers in the ground as make-shift habitats. Later habitats are build below the surface. Above surface can be done later. Would be nice to have a magnetosphere around Mars though.

  • @jameswest4819
    @jameswest4819 Рік тому +46

    The Moon has large caverns and is in a more suitable location...days to get there rather than months. The Moon gets more sunlight than Mars also because of its location. Strangely, temperatures in the openings into the caves have been measured around 60 to 70 degrees Fahrenheit. The Moon is a much better location as a base for asteroid mining as well as source for water and metals and would be a great place for manufacturing. The caverns there would make great places for green houses with grow lights and fiber optics providing light. We should not overreach and bypass the Moon.

    • @jaymethodus3421
      @jaymethodus3421 Рік тому +3

      You win 🏆

    • @malcolmrickarby2313
      @malcolmrickarby2313 Рік тому

      The moon has the problem of low gravity. Not great for humans long term. Twenty eight day days and stronger solar radiation . Mars is more suitable for a long term human habitation but the moon will be the gateway for much space travel. 🚀💫

    • @jameswest4819
      @jameswest4819 Рік тому

      @@malcolmrickarby2313 I think that we will use a spinning doughnut shaped habitat attached to Starship that will act as a filling station for vehicles going to the surface or back into space. Periodic visits for enough time to regenerate various cells in the body.

    • @heartflame503
      @heartflame503 Рік тому +1

      @@malcolmrickarby2313 having a 10 meter running circuit will be able to provide 0.5g to 1g while you exercise. That is is likely to be enough although the 1/6 g of the moon is likely to be enough too.

    • @matthewviramontes3131
      @matthewviramontes3131 Рік тому +7

      Why not both places? We can have bases on the Moon, *and* on Mars.

  • @justinratcliffe947
    @justinratcliffe947 Рік тому +5

    "You got what you want Cohaagen, give these people air."

  • @billlyell8322
    @billlyell8322 Рік тому +3

    It makes sense, using existing lava tubes that you only have to seal from the hostile surface any point it is exposed. Obviously you would want to line the walls to strengthen them and prevent future breaches. Much more practical than a domed city.
    As for getting views of the surface they have this neat new invention called closed circuit video. Much less risky than a window or a dome.
    As for food it could start with sprouts for vitamins and adding protein, fiber and starch to fill them up.
    By sending up fish fry like say talapia could be a great start to farming protein assuming you can find a source of water. Imagine a pond running down the length of the
    tunnel middle not only provides you with a lovely view, but also holds fish to eat. Like one long huge aquarium. As you expand you can add other fry like catfish, trout, grouper, clams, muscles etc ... and all of them pooping out fertilizer for the plants that keep their water clean, and yes even feed them too.
    The water can be filtered through aquafarms that would grow vegetables to expand their diets. And the roots stems and leaves not eaten could be used to make a mulch that could amend the dirt to grow larger or other plants.
    You could send chicken chicks up too, to create a supply of eggs and meat. Ducklings and goslings are another expansion to the protein source.
    With human and animal sewage there is a steady source of fertilizer that could be added to processed soils to expand to other plants that filter the air and provide them greenery to live around.
    Power could come from a network of surface or near surface micro reactors and thermal electric generators that not only power to run the colony but also heat to warm it. And if you ran them at say 70% capacity then if one ever did go down or need maintenance then the others could take up the slack until it is repaired or replaced. Also several smaller reactors is much less vulnerable to a single disaster than is one large reactor.
    Come to think of it we could even start doing alot of these things here on earth too, just to practice and get the process down. Of course we would have to put up with decreasing our reliance on fossil fuels a time bit, and possibly making food more plentiful and cheaper to buy a tiny bit. Maybe even lowering the polution levels a smig. But I'm sure we could suffer through that burden. Don't you?

  • @MichaelJeffers75
    @MichaelJeffers75 Рік тому +9

    I would do both, the domes and underground homes

  • @Semtekk57
    @Semtekk57 Рік тому +11

    Mars Colony One/Six is an entertaining series of books from Geral M. Kirby I really enjoyed that has caverns in it.

  • @solifugus
    @solifugus Рік тому +4

    I think mass-producing stainless steel sheet metal will be practical, on Mars. Also, mass-producing PVC could also be practical, given enough energy. You could build stainless steel buildings using cold-welding (pushing steel together in the absence of oxygen, causes a bonding like pushing clay together). Pure PVC is highly insulative, fire-resistant, and transparent with a slight blue tint. Anyway, I'd build villages skinned with sheet metal, and structured with corrugated or bent sheet metal. I'd build the roof to overhang a big, cover the top with up to a meter of regolith, use blown glass bricks for windows, and coat the interior with a PVC membrane. This would be buildable with all materials and energy from Mars and be very safe. It would protect from small meteors, retain warmth, allow sunlight in, and hold air in really well.
    So smelting iron and nickel (very abundant on the surface) can be done with a lightweight titanium crucible and a solar concentrator (for heat). Purification during smelting (normally done with things like borax) can be done by injection of pure oxygen. Pickling and cold rolling to make highly impact-resistant and malleable stainless steel also shouldn't require too much equipment. PVC can be made using the abundant salts in the ground (for chlorine), CO2 in the air, and steam -- using the pressurized steam method. 1 meter of regolith is enough to block the cosmic rays to more than safe levels and also will catch small meteors that are most typical. Larger impacts blowing debris laterally should also not be too damaging, as cold rolled steel is hightly impact-resistant.
    A PVC member is very insulative and abrasion resistant, however, if the habitat is separated a bit from the ground, heat dissipation should be very slow. This is because the atmosphere is so thin. Although very cold, transference of heat outward should be substantially slowed due to the distance between molecules in the atmosphere.
    That said, I do also like the idea of lava tubes. I drew up designs for an inflatable wall with airlock to seal off two ends of the tube. Smoother lava tubes tend to be sealed somewhat air tight due to the melted nature of the walls. However, this would not be sufficient because one leak is too many. I'd spray it down with a hot PVC membrane. The problem is that Martian lava tubes are far larger, on average, than Earth ones. I visited a lava tube in Cheju-do island, Korea. It was about 10 meters wide. The lava tubes on Mars are vastly larger due to the lower gravity and double the metals content in the basalt. So that's great if you can seal it but much harder to seal.
    Another idea is to melt out a city in one of Mars' large tropical glaciers. You'd need to build a surface airlock but it would be vastly faster and easier to melt out large spaces in which to live. Inside an ice cave, you can create comfortable room temperatures because the vast ice behind the walls helps prevent melting. Also for higher temperatures, such as for growing tomatoes, you could use an insulative membrane in the grow rooms. Obviously, you will be using LED grow lights. You can make tables, chairs, beds, sofas, from ice and just need to cover them with an insulated fabric.... You could even make plates and cups from ice. Throw an insulated membrane in, and you could make a heated swimming pool. This is clearly the fastest and cheapest way to build a city but I'd put airlocks at various points to compartmentalize, just incase of a catastrophic break.... although that is only going to happen if you build too large or too close to the surface. With the low gravity, you could build some pretty large rooms.... maybe a football field or such, safely.
    You didn't mention energy. While I think nuclear would be awesome, I think the best thing you can do in situ is wind turbines. Solar panels only last about 30 years or so and not at all during the night or the months long summer dust storms. A machine shop should be able to build the generators easy enough and the blades will need to be big but there is a steady 15 mph wind day and night, even better in dust storms.

    • @sidstevens9035
      @sidstevens9035 11 місяців тому

      Wind turbines in a virtual vacuum (0.8% the atmospheric pressure of Earth's) you seriously need to rethink this.

  • @bb1111116
    @bb1111116 Рік тому +5

    Almost every plan to have humans live on Mars can be done on earth’s Moon.
    For instance the idea of an underground colony has also been proposed for the Moon.
    There are several articles on the internet about underground Moon colony proposals.

    • @alengrm7488
      @alengrm7488 Рік тому +4

      Moon could be used as a space factory for spaceships. It would take less energy and fuel to produce and lunch them which would also allow us to make them bigger and more complex

    • @bb1111116
      @bb1111116 Рік тому

      @@alengrm7488 ; yes the Moon can be used for manufacturing. It can also be used for science. People could live there as they live in Antarctica today. And people could live on the Moon long term.
      The ways to do all of that have been thought out and there are plans to make it happen.

    • @eyecomeinpeace2707
      @eyecomeinpeace2707 Рік тому

      But the Moon has very low gravity compared to Mars and it will create a lot of physiologic dyscrasias in blood and bone over time etc.

    • @bb1111116
      @bb1111116 Рік тому

      ​@@eyecomeinpeace2707 ; both Mars and the Moon have low gravity which has harmful side effects on the body.
      Mars is about 1/3 the gravity of earth.
      The Moon is about 1/6 the gravity of earth.
      * The advantages of dealing with this on the Moon over Mars.
      1. Travel time between the Moon and the earth is 3 days.
      And the launch window, weather permitting, between the earth and the Moon can happen every week.
      - So, if people on the Moon need earth’s gravity for heath reasons, they can easily be sent back to earth to get it.
      - Travel time between the earth and Mars is 7 months.
      The Mars/earth launch window can only happen every 26 months or about every 2 years.
      - So, if someone on Mars needs earth gravity for health reasons, they cannot easily get it and will suffer more physical damage.
      2. What about a long term tech solution which can be done many years from now to create artificial gravity with living on Mars and the Moon.
      - One idea is to have a rotating circular, centrifuge, living quarters for at least during sleep to simulate earth level gravity.
      - But when it is possible to build large structures off of the earth, such as centrifuge living quarters, it will be much easier to do that on the Moon compared with Mars.
      That again is due to the much shorter travel time to the Moon and the easy to obtain launch window as I explained above.

    • @eyecomeinpeace2707
      @eyecomeinpeace2707 Рік тому

      @@bb1111116 Yes they are all valid reasons for sure. I suppose I was just thinking how mankind likes to go deeper and beyond the safe tethers of home. I often think of all the European seafarers and explorers in the past that pushed to the limit especially with their beliefs of the Earth being flat and all. They had to put up with a lot of adversity in the New World but persevered and overcame and hence, here we are in this New World typing to each other here with vast cities and civilizations in both American continents. The human spirit is strong.

  • @angelstrong792
    @angelstrong792 Рік тому +1

    Nice video, thanks for sharing & Godspeed!

  • @johnstewart579
    @johnstewart579 Рік тому +1

    Agreed. Skilled spelunking astronauts will be prime candidates for a future Mars colony

  • @davidd6171
    @davidd6171 Рік тому +7

    Am I losing my mind or did you guys already cover this topic?

  • @c.ladimore1237
    @c.ladimore1237 Рік тому +4

    good bet would probably be the giant canyon walls too. radiation protection, less digging, probably has water, et al.

    • @eyecomeinpeace2707
      @eyecomeinpeace2707 Рік тому

      And maybe the air pressure would be higher as well deep in those canyons.

  • @shnasuel6492
    @shnasuel6492 Рік тому +4

    This video is so good.
    Real winner for me.
    :D

  • @niverian7789
    @niverian7789 Рік тому +4

    I will agree on underground cities. Far less resource management, easy to seal off with the right knowledge and can be kept well maintained. After all, terraforming Mars would take several millenia or more, if at all.

  • @MyDreamLife
    @MyDreamLife Рік тому +4

    How about just build an underwater city here on Earth? It would cost way less and also more practical too.

    • @spacetimegeezy
      @spacetimegeezy Місяць тому

      😂 why wouldn’t they just build underground here? Building an underwater city is no where near practical

  • @millerscuba1
    @millerscuba1 Рік тому +9

    Great video. I always kind of pictured the underground city would look like and feel like a mall.

  • @quietprofit5817
    @quietprofit5817 Рік тому +3

    i loveyour content, saw this, umm yesss.

  • @ogzombieblunt4626
    @ogzombieblunt4626 Рік тому +6

    7:50
    The distance from the sun is pretty insignificant in terms of how fast a planet cools, unless aignificant tidal effects occur i guess... it has to do with surface area to mass. Larger planets have more mass to surface area.

  • @vincentcleaver1925
    @vincentcleaver1925 Рік тому +4

    Into the stars... Is interesting. Gonna need SPF 18 million

  • @lucidmoses
    @lucidmoses Рік тому +26

    I've still never heard of any ideas of how to make a self sustained echo system on Mars when we can't even do it on earth.
    Also, If the caves don't collapse from the change in temperature (rock expansion). Then heating may not be as big a deal. All the equipment they use will creates heat. As time go on the heat will penetrate the rock deeper and deeper stabilizing the heat. Much the same way medieval castles worked. In fact they may end up with a cooling problem and have to move some of the equipment outside.

    • @mikepotter4109
      @mikepotter4109 Рік тому +3

      ecosystem, earth does that on its own, caves make sense, no ecosystem on Mars

    • @surelyyoujokemeinfailure7531
      @surelyyoujokemeinfailure7531 Рік тому +5

      Lucid - correct. We can't even make a self-sustaining colony on Antarctica, which already has radiation shielding (the atmosphere and Van Allen belt); breathable atmosphere at correct content & pressure; abundant water ice/snow; much cheaper shipping FOB Cape Canaveral.

    • @rolflandale2565
      @rolflandale2565 Рік тому

      Predominantly underground is feasible. bubble domes can be super radiation & thermal tinted, even crops plants/trees can be photosynthesis transfer from external solar 🔋 to internal halogen lamp🔦 , sustaining naturally o2 & vapor recycle♻️ H20.
      Elon is correct in nuking, (more like erupting lava & ice really) to tarriform, BUT! The magnetospher will *not hold the atmosphere* for long, The Earth spews 2%+ annually out to space, the core multiplictis it more than its *efficient size* core compress energy it bares to cycle life.
      Gravity is a issue to your third generation on Mars/moon. Morph body form, likely hunch-back/tail & giant able growth versus low *grip* ratio mass mobility. ( The way Earth was at one time of its eons of reincarnation form. 🦕👀?!).

    • @jameswest4819
      @jameswest4819 Рік тому +1

      Don't know where you guys got the idea that we would need to be self-sustained ecosystems. The whole idea is to mine the resources outside the habitat on the Moon or deeper into the caverns. There are measurements of 60-to-70-degree F temperatures in some of the openings into the Lava Tubes on the Moon for some unknown reason. Also, there may be gases like oxygen and CO2 and fluid water deeper in the caverns. Atmosphere could be contained with inflatable tents with some variety of concrete composed of regolith stuck together with some type of cement to construct an inner skeleton or outer protective shell. Tubes could be used to move the air through some kind of heat exchanger to cool the atmosphere. Maybe something like gunite, a mixture of cement, sand, and water applied through a pressure hose, producing a dense hard layer of concrete used in building for lining tunnels and structural repairs, could be a useful material, to strengthen the walls and floor.

    • @surelyyoujokemeinfailure7531
      @surelyyoujokemeinfailure7531 Рік тому +2

      @@jameswest4819 Would love to see them show off that vaporware tech down at the south pole, where shipping costs are a lot lower.

  • @RavenTD46
    @RavenTD46 Рік тому +4

    I loved the Martian Chronicles series.

  • @camilkegels3640
    @camilkegels3640 Рік тому +6

    I think it's likely we would have a sustainable outpost in 175 years from now

    • @matthewviramontes3131
      @matthewviramontes3131 Рік тому +5

      Finally someone who gives a sensible timeframe. I'm so sick of fools thinking all this stuff is gonna happen in like the next 10-20 years. Mars is literally a different world, with no air, massive radiation, less gravity, and is literally 1,000 times further away than the Moon. All of these things will take time, lots of time, to come to fruition. Within say 50-100 years hopefully we'll be able to get some good Moon bases going and start having humans live there in like 6 month durations like in Antarctica, and then within 100-200 years get Mars going, and over the course of a thousand years, hopefully we can have the entire solar system colonized.

    • @alexbaty1814
      @alexbaty1814 Рік тому

      @@matthewviramontes3131 Starship if it can live uptoo Elon's expectations, will make it possible in 20-30 years. It is going to revolutionise space travel as big of an impact as the first plane, or in the internet.

    • @camilkegels3640
      @camilkegels3640 Рік тому

      @Get to the Choppaa what do you consider in this case "a long time"?

    • @lancepage1914
      @lancepage1914 Рік тому

      Love reading the borderline insane ideas and delusional comments here. They believe everything Elon Musk says too, doesn't matter how borderline retarded it is and most of his ideas will never work. Nothing 'groundbreaking' is going to happen for over a century or two.

    • @courtneycoley8487
      @courtneycoley8487 9 місяців тому

      ​@@alexbaty1814yikes it makes u wonder how many plane crashes happened in the first 20 years to realize how many space ships will between here and there

  • @ronaldsmith6829
    @ronaldsmith6829 Рік тому +7

    I remember reading the stories from Heinlein, Clarke, and Norton about this subject. They were thinking along much the same lines back then. As to living in the caves or dome cities, no thank you. I'm happy right here on my home planet.

  • @craigo8598
    @craigo8598 Рік тому

    Great video, thanks

  • @ricster1978rh
    @ricster1978rh Рік тому

    Good job on the video 👏👏👏

  • @punkypinko2965
    @punkypinko2965 Рік тому +4

    I believe if we are to find evidence of alien life, we will have the best chance of finding it within our solar system vs searching for it in other star systems.

    • @justwannabehappy6735
      @justwannabehappy6735 Рік тому

      Why ? Mars has no magnetosphere

    • @matthewviramontes3131
      @matthewviramontes3131 Рік тому

      @@justwannabehappy6735 Mars is not the only planet/body in the solar system

    • @matthewviramontes3131
      @matthewviramontes3131 Рік тому +1

      Yea my best guess would be on Titan, Enceladus, Europa, or some other moon in the solar system. And mayyyyyyyybe life on Venus either underground, in the atmosphere, or perhaps near the poles.

    • @punkypinko2965
      @punkypinko2965 Рік тому

      @@matthewviramontes3131 And maybe evidence of past alien life as well. There might even be an ancient alien probe on the dark side of the Moon for all we know.

  • @MXP90DL
    @MXP90DL Рік тому +10

    Hmm, I would prefer the caves to start. Having serface towns could then be built to support activities outside. Maybe not as permanent but really handy.

  • @hexacarbide268
    @hexacarbide268 Рік тому

    Great video! Thx

  • @mateeeoooesc
    @mateeeoooesc Рік тому

    Let’s gooo new vid

  • @williambuchanan77
    @williambuchanan77 Рік тому +2

    A colony on mars will definitely find lots of archeology, it's been seen too many times for it not to exist. At a stretch I'd say they might find valuable artifacts from ancient civilisations. If a mars colony came into contact with one or more alien civilisations trade relations and passing of knowledge could see those colonies becoming independent.

    • @justwannabehappy6735
      @justwannabehappy6735 Рік тому +3

      ... sorry bud, but there isn't any civilization on Mars. Otherwise we would have seen signs of it by now.

    • @williambuchanan77
      @williambuchanan77 Рік тому

      @@justwannabehappy6735 not really, if some certain people don't allow us to see it we wont, but a colony they can only control that information for so long before the colonists tell everyone they're in contact with on earth. Earths ruling classes might one day have to accept an independent mars colony.

    • @marbleman52
      @marbleman52 Рік тому

      @@justwannabehappy6735 To play a little bit of "Devil's advocate" here: Scientists have only recently, and some very reluctantly agreeing with, the acknowledgment of liquid water on Mars at certain underground locations such as at the poles. And Mars has been studied and photographed in great detail for decades now and the liquid water debate is just now being discovered to be true.
      Millions of years ago, Mars was very different than what it is today. It had more of an atmosphere, warmer climate, running water on the surface; the necessary factors for life to exist and grow. Then a planetary catastrophe happened and the atmosphere was ripped away and Mars died. Over the millions of years since then, any surface evidence of sentient life would have been been erased.
      So, to say that ......"we would have seen signs of it ( past civilization) by now", is not necessarily true. We are just going to have to go there in person and do a lot of exploring to say definitely one way or the other.

    • @lancepage1914
      @lancepage1914 Рік тому

      Everything is possible, according too Elon Musk. Even our own delusions. Lol.

    • @Ivan.A.Trulyuski
      @Ivan.A.Trulyuski 11 місяців тому

      @@justwannabehappy6735not if they’re completely underground.

  • @wayneschenet5340
    @wayneschenet5340 Рік тому +4

    Living on Mars is a ridiculous idea! Living underground would be very depressing!
    Walking about topside in a spacesuit would be very inconvenient and no beautiful scenery and no trees. Why would anyone want to live there? We need to take better care of our home planet! ❤😊

  • @adak2050
    @adak2050 Рік тому +1

    We absolutely have to live underground. Pressure/radiation/dust storms make living on the surface impossibly expensive. Find a 2 mile long by 1/2 mile wide lava tube and put large pressure doors at each entrance. Pressurize the tunnel, add buildings, lots of water/trees/plants, create a very earth-like small city. The bigger the happier the people. At the same time build hundreds of factories with robots up on the surface to spew greenhouse gases to thicken the atmosphere and start terraforming. Experiment with super gases like Methane and others to speed up the process. Introduce bacteria into the soil that will take out the Percolates and introduce Nitrogen producing bacteria. After 50, 100, 500 years once we get the atmosphere thick enough, that will increase the surface pressure and allow liquid water at the surface. Then just plant massive amounts of trees and plants to pull Carbon dioxide out of the air and start putting in oxygen. Then theoretically we might be able to take off the space suit on the surface.....

  • @ivaluska
    @ivaluska Рік тому +1

    One last problem nobody ever seems to talk about when it comes to colonizing Mars is the effect of low gravity on the human skeletal system, which then has catastrophic effects on almost every other system in the body. Zero gravity accelerates this, like on the space station, but these colonists will be required to stay for years at about 40% gravity of earth - that will not end well after just a few years. Unless we can build centrifugal cities that create artificial gravity, there is no way can ever colonize mars.

  • @ShadowPuppet3001
    @ShadowPuppet3001 Рік тому +3

    great video, I would choose dome city or slim city, because we have a better chance of surviving mars in domes then we do underground, vote for me to go to mars, am willing to work and put in the time to build a settlement, I am a man of many talents...

  • @jamescarter5042
    @jamescarter5042 Рік тому +1

    Kudos to the engineers who designed his habit It look cozy and relaxing.

  • @mrzoinky5999
    @mrzoinky5999 Рік тому

    It is amazing how information keeps accumulating - The Insight lander suggests the Martian core is molten , but of light elements.

  • @tomekw
    @tomekw Рік тому +3

    Lava tubes are unstable, so you can't build a settlement there. They would need to be supported, but it's easier to support tunnels made by a drilling machine because of their more perfectly rounded shape. So it wouldn't be a viable solution to use lava tubes.

  • @ericblanchard5873
    @ericblanchard5873 Рік тому +3

    By the time we send humans to Mars, I will probably be an old man or long gone. Unless we figure out 3D Printing in Space and can have a robot army build the settlement for us first, and Fast. I am not going to get excited about another planet any time soon. I badly want to see humanity succeed and become a multi-planetary species, I just don't have faith in Humanity. There are not enough Elon Musks in the world. Seems we always have greedy selfish jealous people running our government(US). I wish we could fast-track all of Elon's ideas to fruition to speed up this man's Dream of bettering humanity. Oh and boring tunnels is the best bet with radiation being a problem on the surface and very weak atmosphere not great for blocking/burning up space debris. Same as a base on the Moon, will need underground facilities for sure.

  • @robertkerby2581
    @robertkerby2581 Рік тому

    Great video!

  • @denismoran670
    @denismoran670 Рік тому +1

    I think this would be a major development - also, in terms of humanity in general, it wouldn't be the first time we have sought out caves a s a habitat!

  • @michaelmitchell4989
    @michaelmitchell4989 Рік тому +1

    Yes, bring on the underground habitats.

  • @worldsboss
    @worldsboss Рік тому +1

    Makes sense to start with caves, then as more people settle there and more infrastructure is available, progression onto the surface could become possible.

  • @PaulADAigle
    @PaulADAigle Рік тому +1

    A domed location is a great start. From there, you can go on cave hunting excursions. SpaceX needs to send more materials than people, repeatedly, until there's some equipment to work with for Geothermals, Investigations, and Health maintenance. It'll be "send us and , so we can do ". All currently still TBD.

  • @-OICU812-
    @-OICU812- Рік тому

    Cool video!

  • @sweenie58
    @sweenie58 11 місяців тому

    Mining on Mars where the robots mine out the inside of the crater wall. Then people can have a place to build out later. With mining out areas you can know exactly what you need for build outs, less waist. You could launch the boring machines from inside the excavated areas. You can plan out window systems and shutters to stop the cold/storms etc.

  • @TonyG_VT
    @TonyG_VT Рік тому +2

    Ideally a hybrid of underground tunnel networks and caverns. Apartments underground and other industrial capacity. People would need access to the openings (akin to Central Park in NY) where large domes would allow sunlight and greenery. Living spaces should be kept at 65 degrees and open areas would be warmer. Use underground nuclear power plants to maintain life support.

    • @fitipapani9805
      @fitipapani9805 5 місяців тому

      thats damn cold lol i need 299k+

  • @wvaudi7119
    @wvaudi7119 Рік тому

    Cave for a good start is more than safe start requirement. Tnank you !

  • @graybryan9521
    @graybryan9521 Рік тому +2

    I think caves are a good solution but I would perfect the techniques on the Moon first.

  • @angelstrong792
    @angelstrong792 Рік тому +1

    ...a new earth...there is no more sea! I prefer both dome & underground! Godspeed!

  • @efanjul5768
    @efanjul5768 Рік тому

    A cave with access to a dome sounds good enough for me!

  • @vidyaishaya4839
    @vidyaishaya4839 Рік тому +1

    Ever since I heard about the Boring Company, I've been a fan of caves on Mars. We can start with looking for caves, and by the time we get serious about settlement, I expect we'll have located some that are excellent. As for the Moon, it's even more idea for underground digging to half half the gravity of Mars. On Earth we'll likely have to go with above ground domes for urban areas and growing food and other necessary vegetation. We'll need a lot of vegetation to scrub the atmosphere of carbon dioxide here and in space, including the Moon and Mars.

    • @mlt6322
      @mlt6322 Рік тому

      It's carbon monoxide, carbon dioxide is what's in the soda you drink and it's harmless.

    • @vidyaishaya4839
      @vidyaishaya4839 Рік тому

      @@mlt6322 right. It's in our atmosphere. In high concentrations it caused drowsiness. The ISS has had it figured outfor over 20 years. Inefficient converters make oxygen and carbon monoxide. SpaceX wants to combine carbon dioxide with water, and make methane and oxygen. That's what they'll use for rocket fuel. Oxygen on Mars will mostly come processing rock. On the Moon they'll make it from water until they get to processing rock.

    • @cary4211
      @cary4211 Рік тому

      @@mlt6322 The atmosphere of Mars contains 95% carbon dioxide, 3% nitrogen, 1.6% argon, a little oxygen, water vapor and methane, with an average molecular weight of 43.34.

  • @hunterashwill-ng4ew
    @hunterashwill-ng4ew 4 місяці тому

    I definitely believe that living in a cave is the best option, it has way more pluses. And it would be cool to actually step on Marshin soil, with no radiation, that soil actually has the best chance of growing food as well.

  • @ThePlaceForThings
    @ThePlaceForThings Рік тому

    sounds like a Kim Standley robinson novel 🚀 ❤ the idea of potential sub glacial lakes on mars is exciting

  • @crosisofborg5524
    @crosisofborg5524 Рік тому +1

    Caves would be ok as long as there were also some domes where we could go for a less claustrophobic view.

  • @jroar123
    @jroar123 Рік тому

    Sealing a tunnel underground on Mars is one hell of a leap. If the same sort of tunnels exist on Earth, the first step would be to practice right here first. Once all the bugs are worked out, then take it to the Moon. Once you work a underground planetary habitat is up and working then take it to Mars. Personally, I would have entirely different missions. We need to hit the grocery store before camping and that means we need asteroids latent with frozen H2O, O2 processable minerals, and more. We have all the building blocks for a massive space station. Maybe that should be considered before Mars as well.

  • @brandonsheffield9873
    @brandonsheffield9873 11 місяців тому

    It should be a mixture of tunnels and domes. The dome provides window for light and heat that can be directed to areas underground. Kind of like a skylight. The dome or window filters out the excess radiation, while allowing heat to build up for the underground habitations and food farms. We could also send AI rocket cranes to the astroid belts to collect rocks that have frozen water on them. Then when put in orbit around mars harvest the water and send it underground.

  • @GenealogistBuchanan
    @GenealogistBuchanan Рік тому +1

    A cave city seems great. CCTV can provide "windows" with outside views, if wanted.

  • @RealNoahsArk
    @RealNoahsArk Рік тому +1

    It's Already Build!!

  • @JasperH5150
    @JasperH5150 8 місяців тому

    Thank you for not playing dramatic loud music in your videos... We can actually understand your dialogue... Thank you!

  • @stevec404
    @stevec404 Рік тому +1

    Underground offers far more than the surface of Mars.

  • @hazard0582
    @hazard0582 Рік тому

    Underground with steel shielding at surface is good there is possibility there is small twister on mars.

  • @Rocket_Man
    @Rocket_Man Рік тому +1

    Had a successful Falcon 9 launch, 1 step closer🤙🏿

  • @lawrenceiverson1924
    @lawrenceiverson1924 11 місяців тому

    What I think best would be to find a water well near a cliff face ( sandstone would be ideal ) Then start drilling sideways into the face . drill out a lot of space for living in . Drill up to near the surface for greenhouse area drill a number of different levels coat the inside with something air--proof , make doors and windows in the cliff with a big door at lower ground level Viola !!!!

  • @lauratogni2472
    @lauratogni2472 Рік тому

    The original total recall makes so much more sense now

  • @peterblair6489
    @peterblair6489 Рік тому

    Nobody ever talks about colonizing space itself. That's the future.

  • @lewisbrodnax7898
    @lewisbrodnax7898 Місяць тому

    I can easily see an underground habitat being acceptable. If there were some central area with access to natural light, like a solarium in a roman villa, it could even be illuminated via glassfiber optical tubes. That would be a great place for gardens to be.

  • @leonwilliams9589
    @leonwilliams9589 9 місяців тому

    I keep picturing huge open spaces like The Dwarf mines and cities. But full of technology and taller native born Martians.

  • @wizzardofpaws2420
    @wizzardofpaws2420 Рік тому +1

    No matter what, the dust storms that last for months is going to be the one thing that can't be controlled.

  • @ItisMoody
    @ItisMoody Рік тому +2

    This is a very dystopian idea and I don’t understand why you’d say that we “all” wish life on Mars will happen! I really don’t. Are we already giving up on THIS planet?!!!!!

  • @billbobaggins992
    @billbobaggins992 Рік тому

    I cant wait for backblast data to pour in

  • @dreamscapemaestro3732
    @dreamscapemaestro3732 Рік тому

    Both. Work on underground living quarters first then as an ongoing goal develop outside living and working quarters.

  • @douglasengle2704
    @douglasengle2704 Рік тому

    It makes a lot of sense to use nuclear power for generating electricity. The condensing of the reactor steam could be used for heating pressurized caves. Large pressurized caves with very tall ceilings would be idea for conducting deep drilling operations for getting core samples of Mar's interior. On earth no matter how deep the drilling has been there have always been living microbes. This is likely the case on Mars if there is life it will show up in deep drill cores. There is still a chance there is liquid water deep under Mar's surface where geologic heat keeps water above freezing. It might not seem that getting water on Mar's would be as simple as drilling a very deep well, but in some locations or high geologic heat it might be. That might even be possible on Earth's moon.
    Both Mars and Earth's moon colonization depends on being able to do extensive mining for liquid water and minerals for use in a concrete substitute, steel, aluminum and many many other raw materials. These underground mining operations would likely resemble very much the way they are done on Earth. On Earth these large underground mining operations run on very large electric extension cords. There is so much electric energy required for deep coal mining operations they can justify the construction of high voltage electrical transmission lines in themselves. Mining has not been a glamours occupation in the past. These type of difficult labor occupation is different from the highly educated scientific adventure astronaut that currently is the persona of human space exploration. The mining engineers that would likely do this kind of work might only have a couple years of technical education. Being space qualified is going to mean they are very smart at what they do.

  • @MrSatyre1
    @MrSatyre1 Рік тому +1

    I'm curious about soil and rock compaction. Thanks to Mars' lower gravity, everything is less packed than here on Earth. How will that affect construction of above and below ground structures?

  • @robbsaenz6647
    @robbsaenz6647 Рік тому +1

    Underground colonies is probably how we started civilization here. And we probably only did that to terra form the planet to the suiting of the species that sent us here who probably spend a several millennia napping so for them the process is a blink. Let’s just hope we finish before they get here. Probably don’t wanna face them

  • @scottchase8014
    @scottchase8014 Рік тому

    According to some old books I read it shows three different civilizations already built underground on Mars..
    Those pictures of Mars right next to the actual blueprint of our universe
    They're very old..
    1 areas for storage the other area is for living in another area is for growing crops underground
    According to the book The each one of the sites has water 🌊👌

  • @duanium
    @duanium Рік тому

    Totally love the idea of living in underground cities on the fourth rock from the sun...

  • @ElChivoAndy69
    @ElChivoAndy69 Рік тому

    We all wish we could have those dome citys on mars but underground would be better for the beginning and overtime we can build habitats on the surface.

  • @gerardo9108
    @gerardo9108 4 місяці тому

    Vietnam's Son Doong cave has a fascinating system has its very own rainforest, the Garden of Edam.

  • @jimmyrussell9749
    @jimmyrussell9749 2 місяці тому

    Go underground below Olympus Mons. The mountain is an indicator on how much empty caverns are below.

  • @corujariousa
    @corujariousa Рік тому +1

    I understand Mars gravity is around 38% of Earth's. That alone makes for huge biological challenges for which we do not have a full understanding and of course no means to counteract. We know lower gravity has significant effects on bone density, healing, plant growth and even affects how medicine works in our bodies. On top of these huge challenges, even if we can manage to sustain a colony on Mars, the populations will most likely never return to Earth so the newborns are likely to be a very different version of humans.

  • @erikjohansson1777
    @erikjohansson1777 Рік тому

    It could be a combination of underground town in caves of about 3/4 part and 1/4 part outside but both áreas connected. This solution for about 3000/4000 People could be finished around year 2100-2110.

  • @theo9952
    @theo9952 Рік тому +3

    I really hope to see all these science miracles in my next life, provided that reincarnation is true. Alas I was born way too early to see and experience them in this life.

  • @colin1235421
    @colin1235421 Рік тому +2

    How would they get sufficient vitamin D? I believe supplemented vitamin d is not very good.

    • @jarikosonen4079
      @jarikosonen4079 Рік тому +1

      Maybe artificial sun light. Genetically engineered plants, maybe similar like "Golden rice".

  • @barriewright2857
    @barriewright2857 Рік тому

    That idear of cities on Mars under ground is what i call a obvious answer . For me I would live anywhere on Mars as long as I have all the necessary facilities to live with.

    • @matthewviramontes3131
      @matthewviramontes3131 Рік тому

      Would you be willing to have a child there, especially knowing they could turn out way different?

  • @jscottupton
    @jscottupton Рік тому +1

    Sounds great...BUT...BUT...BUT.... The low gravity situation is a killer.

    • @FalloutConspiracy
      @FalloutConspiracy Рік тому

      Colonists could just wear space suits that are heavy enough to compensate for the reduced Martian gravitational force. The total weight of the suits worn by the colonists on Mars would negate the reduced gravitational effect and make their weight proportional to the weight of said colonists if they were standing on the surface of the Earth.