There is a moral reason for NOT going to Mars, we are told obsessively with a smirk by people of little imagination... Minding our business on Earth first. This mussel-clinging-on-a-rock style of argument ignores human nature, and what motivates it.
Clinging to the old ways and the ancient rock is the usual argument of those obsessed by their navels and who are reluctant to move out of their gardens: we must solve what we have where we are, they whine from their wheelchairs.
Brian Cox, or an AI pretending to be Brian Cox, a well-known British science guru, posited, in a gloomy, feverish voice, that “humans can’t reach Mars”. According to him, that would kill Earth. A few days later an AI produced a similar podcast supposedly from Brian Greene. (These podcasts are often very interesting, although they also containing glaring, most significant errors!)
Mr. Brian Cox AI pretends we cannot inhabit Mars any time in the future, it’s too harsh out there, but then he mentions, to his sorrow, that human colonization and Mars terraforming may already be going on thanks to our domestiques, terrestrial critters already there because they survived our sterilization attempts…
Indeed, lots of Earth species can survive Martian conditions and others can be tinkered with to colonize there: research labs already have plenty of these modified species. Modified easily and at little cost. Martian dust, like Moon dust, is a big problem: it goes everywhere and it is toxic and abrasive. We will see what colonization by primitive forms of terrestrial life does to the Martian dust (in the long run, it will make it manageable). Transported Earth life will change Mars, on its own, and fast.
So we could start some sort of Terraforming pretty quickly? Not so, claims Mr. Cox, because we must not colonize Mars. But we can’t, according to him, why must we not? If we can’t, we can’t and whether we must or not is irrelevant.
This silly video worries about nuclear devices in space, although nuclear devices will be on the Moon within ten years because the Moon has nights which are two weeks long (the programs are launched by NASA and its Chinese equivalent).
Example of glaring errors in those videos making war on Mars? Pretending that radiation shielding from fuel aboard the spacecraft would go down, because we need fuel to go to Mars… Except one needs no fuel while cruising (that shows that the anti-Mars videos have not been reviewed by someone with high school physics).
Another glaring absurdity: pretending that aerobraking is impossible on Mars because of the thin atmosphere… While actually the aerobraking happens at much lower pressure than Mars’ ground pressure, even on top of Olympus Mons… And Martian aerobraking was used many times already, and in two different ways. Or claiming that Mars’ quakes would be a threat to a human base. A French seismometer carried by NASA made it on Mars, and functioned very well, so we have data… Mars quakes are much rarer and much weaker than on Earth… As anticipated, for the obvious reason that Mars has no plate tectonics.
The whining about things taking longer than expected, and have never been done before, which Mr. Cox AI or Mr. Greene AI engage in profusely, is besides the point: colonization of Mars already is, and long will be, a matter for robots and AI.
The long litany of problems that Mars human exploration and colonization will keep on presenting is not a showstopper, just the opposite: the more problems colonizing Mars presents, the more interesting Mars gets. For example building a Martian magnetic shield is feasible (in two different ways; holding a device at the Lagrange point is already routine: see the James Webb Space Telescope, and the energy could be produced easily from solar panels… that has been studied). On top of that Mars colonization will be mostly preceded by colonization of the Moon. AI and robots will lead.
Real scientists rejoice in questions and problems: they do not whine because brain teasers appear all over. Boredom is the enemy: change is a friend.
Many, if not most problems on Earth will not be solved mostly because the problems themselves are in balance with the power of today’s Earth elite hierarchy. For example, using massively fossil fuels advantages a number of nations which have enough clout to keep the present order going (not that there is much choice).
Colonizing Mars would be another reason to make compact controlled thermonuclear fusion work… And so on. This is a good example: thermonuclear fusion would be nice to have on Earth, but most authorities behave as if it is not necessary (in truth, it is). On Mars, thermonuclear fusion is pretty much a necessity to terraform the planet quickly… Authorities will agree with that.
Another must to colonize Mars is to be able to commute there quickly. And sure enough, now that sending humans there is imaginable, not to say proximal, nuclear rocket propulsion is becoming something desirable, and research programs have been relaunched… Nuclear rocket engines were made to work more than half a century ago, the NERVA program… And they worked very well, achieving 800-900 specific impulses, more than twice the best chemical rocket engines, hydrogen-oxygen engines… The program was considered highly successful technically, meeting or exceeding goals for power, thrust (up to ~120 tons of thrust in some designs), and reliability: a worst case nuclear explosion was deliberately engineered, and proved not bad at all, as expected [1].
and even safely: a fully functioning nuclear engine was deliberately made dysfunctional and shut down OK…)
Brian Cox pretends that a Mars colony will be extinguished by the “Tasmanian Effect”, the fact that isolation will cause cultural degeneracy, as happened in Tasmania. But a Mars colony will not be isolated at all. Tasmania was isolated from all communications for millennia, whereas communications with Mars will be at most twenty minutes away…
Pretending that future science will not come to be is silly. Especially in light of the fact that going to Mars will force us to find new science and develop new technology!
“Planetary protection”, the sterilization of probes sent to Mars has been tremendously costly. As the situation is getting clearer (perchlorates in Martian soil), strenuous sterilization has been relaxed. There are two possibilities: either there is remaining life on Mars, and then we must rejoice as we will learn a lot, or there is no surviving life, in which case there is no ethical problem in colonizing the planet.
The truth is simple: Mars will double the landmass at the disposal of humanity and the techniques developed to establish a colony there will enable the colonization of the asteroid belt and moons around Jupiter and Saturn… And there are plenty of important resources out there, for example Helium 3…
It is likely that terrestrial life originated on Earth (because Earth had a tremendous heat episode)… So we are going back home. In the future, going there back and forth will probably take a few days… And the litany of horrors of Mr. Cox will remind us of the horrors of the Atlantic as seen by some intellectuals during the Middle Ages. It seems Mr. Cox has billionaire envy: how do they dare want to go there, propelled by their egos? Well, the “discovery” of the Americas by Colomb was financed by an extremely wealthy woman…
What could be a serious problem in launching Mars terraforming soon (with Earth’s organism)? Residual Martian life, underground. One will have to make sure there is none, or if there is some, we will have to analyze it thoroughly before smothering it with Earth’s life.
Practically, everybody is going to space, even Europe is starting to realize it’s surrounded by space, the ultimate frontier. The reason is that space is going to be highly profitable. Many ultra polluting and under powered industries can and should be moved to space (free energy from the sun, and stability at the Lagrange points). Voltaire concluded his novel Candide with:”One must cultivate one’s garden.” Yes, but the wise, and any primate with a brain, will look beyond the garden, and go there if it looks feasible.
Making humanity multi-planetary will increase the survivability of the species. But that reason is somewhat abstract. We suggested here a much more fundamental and pragmatic reason: solving a lot of problems that we would not solve otherwise, staying on Earth (which will not happen, anyway, except for nuclear war all too soon…)
Redirecting human aggressivity, curiosity and ingenuity towards space is wise, just as it was wise to get out of Africa, and for the same exact reason. Africa still has problems, and quite a few solutions were found out of Africa!
We are not simply from Earth, we are from the Solar System…. Which protected our planet for the last five billion years (and it was a miracle). And, once again, we are probably from Mars originally, so let’s find out!
Patrice Ayme
Mars is 150 million square kilometers, same as all of Earth’s continents. At the Armstrong Limit, equivalent to 19 kilometers altitude on Earth, body fluids boil at body temperature, thus a suit must be worn to enforce enough pressure inside the suit to prevent said boiling (exposure to hard vacuum brought unconsciousness within 14 seconds in a real case; subject fully recovered later). At the lowest point on Mars, Hellas Planitia the pressure is on kilo Pascal, one percent (1%) of Earth sea level pressure. The Armstrong limit is 6.25 k Pa. That means that, initially humans will have to go around Mars in pressure suit, not just gas masks.

[1]. In January 1965. Engineers intentionally modified a Kiwi nuclear reactor rocket engine to induce a rapid power surge (prompt criticality), causing it to self-destruct explosively. The goal was to simulate a worst-case failure and study containment/dispersal of radioactive material.
The explosion was controlled and equivalent to a small amount of conventional explosive (estimates vary from ~50 kg TNT to a few hundred kilograms). It destroyed the reactor pressure vessel, nozzle, and fuel assemblies, scattering fragments and some fission products. Importantly, the test confirmed design predictions: fallout was limited, and cleanup was manageable (personnel collected debris after a cooldown period without major issues). This, along with plenty of normal emergency shutdown tests (e.g., rapid insertion of control rods to “SCRAM” the reactor), helped prove the engines could be safely operated and shut down, even under off-nominal conditions.
The NERVA technology was deemed flight-ready by the late 1960s, but the programs were canceled in 1973 due to budget cuts induced by the rather anti-tech lawyer Nixon, who happened to be US president, and who also shut down the Apollo program (an adviser, Weinberger, persuaded Nixon to allow the flight ready last two Apollo landings).
Nixon also selected a modest program presented to him by NASA, the Space Shuttle, an abvious mistake which, from the start achieved nothing special except dangerously manned hypersonic flight (all the other Shuttle exploits would have worked better by extending the Saturn rockets)…
NASA had offered Nixon with the choice of going to Mars… And NERVA would have been handy. We are back in this configuration, 55 years later….
When the Ming decided to stop overseas sailing expeditions, they condemned China to shrinkage (and becoming dependent upon Potosi silver brought by Spain to the Philipines!) Fortunately, by an interesting twist, China is now going to the Moon, and the US has to try to precede the “Central State”…




