Elon Musk is an enigma. I’m not sure if he actually wants to go to mars or he’s just a front for DARPA.
Mars is a complete fool’s errand. Why would you want a colony in the first place? A colony must:
Be a net profit economically over time. (Dutch East Indies, British India)
Must be a self sufficient land that can absorb your extra population and serve as an outpost for your civilization. (The US, Argentina, Australia)
Provide some tangible benefit (The cape colony)
Mars provides none of them. By any object criteria its a resource sink and a waste of money. Mars is a freezing, barren desert with an average surface temperature of -81 degrees. It lacks a magnetic field and its surface bombarded with deadly cosmic radiation. It has no water on its surface and its soil is filled with perchlorates. Oh, and it barely has an atmosphere. What little atmoshpere it has is 95% CO2. All its water is also huddled at the poles in a giant frozen ocean.
Thus, it is impossible for it to ever be a self sustaining colony that can absorb earth’s extra population or be a new earth as America became a new Europe and trade partner.
Any martian colony would be permanently dependent on aid from Earth to survive. Aid that is extremely costly and resource intensive considering the immense distances and logistical huddles that come with space travel.
Even if you were to sink tens of trillions of dollars over decades, no colony on mars could ever be self sufficient.
It lacks surface water, so no industry. It lacks fossil fuels so no cheap energy. Its soil is filled with perchlorates so no agriculture. The only population it can ever have is a few thousand colonists huddled in underground bunkers, surviving on bare bones food grown on soil imported from Earth.
Plus, no one would even want to go there. A handful of ”I FUCKING LOVE SCIENCE” neckbeards from reddit might want to, but normal people wont’. I can’t imagine a young couple wanting to move there, on a planet where you can never walk outside without a protection suit, where you have eat potatoes for ever and where your bones would decay over time.
The only way to ever make it a real earth 2.0 is through terraforming. Yes, you could in theory bombard Mars with methane and ammonia rich asteroids to allow global warming, you could melt its ice with a space based magnifying glass, perhaps you could introduce genetically altered algae or nanomachines to give it an earth like atmosphere but…
There are two insurmountable barriers to terraforming mars: low gravity and lack of a magnetic field. Mars is much smaller than earth and thus its gravity is too weak. Even if you were to give it an atmosphere, it would just dissipate away over a few centuries.
Even more, its lack of a magnetic field means that people on its surface will always be subject to deadly cosmic radiation.
To date, no solution has been proposed for these two issues, not even theoretical ones.
At the end of the day, mars is just a dead end, a mirage.
It would be a far wiser venture to forgo mars, and instead, sue the billions to terraform parts of earth. Make deserts of Australia, China and central Asia green. That technology is already within out grasp and would actually provide a new habitat for people.
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