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Why "or"? It must be "and" Did we choose what kind of car we must produce: only gasoline, only diesel, only electric, etc.? Therefore, we should to use androids, thousands of androids. With AI, and robots operated by humans, on the place. Self-replicating (would be prefered) androids, which can make all works we do on Earth: mining, producing, construction. Android do not need the shield from radiation and they do not breath. All of them (androids and operators) will build the cities for future settlers. While androids and robot operators will build the cities, the settlers will come and come, and they will participate in other various jobs. If something will happen wrong on first steps, we could leave all androids on Mars and evacuate only humans, while there are not big number of last, yet. How about an idea to use mega transformers 🙂- specially made spaceships - which will do hardest works on Mars? Firstly it easy to transform spaceship to tunnel boring machine, to digger under Mars's surface.Because both of them are form of cylinder. Benefits of low or g is for problems with skeleton, especially with spine and legs. Especially for old people. Also if you wish to grow (increase your height and weight), you should live on the Mars or Moon from few months to few years. If anybody asks for benefits to settle the Mars, we have similar questions on the Earth: why people live on the small islands in in the compact group. in the ocean, far from the mainland? what benefits to live in the desert or polar regions for the people who live there? While there are many perfect places to live with comfort and have job and all necessary.

But it was swansont's reply. Hijacker🤣

I'm trying to reply to message sent to me.

By my mistake. I'm sorry. Removed

Friday at 05:22 PM @swansont Inner tension is only possible if there is a structure to it, meaning it’s made if something. What’s it made of. And the divergence of the electric field is equal to the charge, meaning field lines begin and end on charges. You said they don’t disappear. Now you’re moving the goalposts. You claimed “we cannot to imagine something which is absolutelly impossible in our Universe” and now you’re limiting this. Modifying it is basically an admission that your claim was bogus. Inner tension of what? Inner tension is impossible to realized by means of structure! Tension realizes only by means of field between any particles. What structure EM field has? Charges can disappear, converting to the field. But field never disappear. Field is a basic form of matter. Where it will disappear to? Charges is just a kind of interaction between particles, which realized by means of field. You cannot to imagine impossible things because you haven't an analogue to do it and unreal parts to compile it. You cannot to imagine impossible things because your brain doesn't work without energy. You cannot to imagine impossible things without your brain which doesn't work independently of our Universe and its laws. Your mind uses only possible understanding processes which is: comparing, opposition, analogue, addition, subtraction, combining, interfering, separating, etc, which are applicable to material objects. "Not exists" isn't equal to "impossible". Not existing things can be possible in some (other) conditions/places/times. But impossible things do not exist. absolutely, nowhere and never. The Universe doesn't contain something physically other than matter.

You’re not the first person to call this a nonsense.🙂 I talk about Physics, namely about basic principles and matter's properties. You don't need the Phylosophy to observe the Moon. 🙂

As I already answered, it isn't impossible thing. Actually, if you accept such possibility - some volume with absolutely empty space without any fields and particles as real - then perpetual motion in such volume (which equal to absolutely isolated system) is absolutely possible thing, by definition. Just drop particles into there. Even me, who do not accept absolutelly empty space as real, consider our universe as absolutelly isolated system which is in a perpetual motion. ... and which not describable by this two conditions as its part(s).

Physical propertiy of matter is inner tension. How you did read this? Maxwell's equations are correct. Basically. ) Please, imagine and describe new condition of matter which isn't exist in our Universe, other than movement and keeping in rest. Or the object without form but with other kind of its representation. It would be interesting how you will describe it, by what words. 🙂 Not an abstraction which we never mean really existing. If you can do it, I will agree that you came from other universe. 😄 Our Universe is an evidence of this.

Firstly, you didn't asked it. 🙂 I consider particles (which have mass) as form of EM field. Only such concept can explain how and why particles (electron-positron pair) converts to gamma-quants and vice versa, and how it is possible, in principle. And how particles emit EM waves and EM quants. Shadows? ) They do not exist as material objects. And my model doesn't describes nonmaterial abstractions. 😉 Physically, you see or not see light which droped to objects and reflected by them with different values, so they look darker or lighter. No it didn't. Length is a property of matter.

You say about dimension, which is a property of matter (both space and substance). Only the matter has properties. Length dimension is one of them. Only material things can be bent, shrinked, expanded, inflated, twisted, as the space inside the dark hole or with the whole Universe. I already said that "EM field isn't a sum of some particles", thus no particles comprise it. The structure of EM field (and base of matter) is special - we cannot to break it to independent parts on any scale of length dimension. Fields have not the borders out of where they absolutelly disappear. Their strength has tendency to zero but never reach such value (in other words, it reach zero on the infinity). The material space which is representation of non-polarized condition of EM field, it doesn't polarizes by itself, i.e. it doesn't generate the EM fields. Only particles do it. But how it does (should) work we cannot understand without phylosophy. In fact. Logics as a base of Phylosophy (and Math too) works same as laws of nature: we cannot to imagine something which is absolutelly impossible in our Universe, because our brain working based on laws of nature (e.g. particles' interaction).

Length is a property of matter. What do you mean under "substance"? EM field isn't a substance (as a sum of some particles). EM field is continuous (not discret) basic form of matter. It's a fact that, no electric field without electric charges, and no magnetic field without moving electrons. It's a right question. I think because theoretical physicists uses only math, and do not consider the phylosophic problems of particles. They adopt, by default, particles in the absolutely empty space (Nothing), which is impossible condition.

It is a form of field (of Matter). Electromagnetic field is a main representation of its properties. It is impossible to expand into Nothing. The space and the substance (particles) being in some ratio which can change in some range. No particles without space, and no space without particles.

15-25 years ago🙂

I read such hypothesis about 25-30 years ago as a comment on one discussion forum. 🙂 Earlier I've also considered such model of Universe, because I don't agree with expanding model of whole Universe. IMHO it explains the dark energy as acceleration by means of gravity which looks like matter condensing unlike expanding model which hasn't any explanation for this phenomena. What about space-time inside dark hole? 🙂 In this case, the space measurement inside dark holes should shrink while to slowing its time down while c (light of speed) is constant. We should observe dark holes (e.g. Event horizon) as greatly smaller then they are.

I saw the question in the title of topic and answered to its author. Not to you. You asked other questions, and I answered to you too.