>Is putting humans on Mars important? Yes. Humans need land to live on, and, in a dynamic environment, they need land to move to. Closed systems are bad because they remove options. A single planet is a closed system. And the thing about land is, as a history teacher of mine used to say, they don’t make it anymore.
(...) Mars is the best local option for setting up a colony and, eventually, a second life for humanity. It’s a bit of a crap option: no magnetic field to speak of, cold as hell, and currently no guarantees of usable water. But Venus is a shithole, Mercury’s a suicide trip and the Jovian system is a radiation trap. Forget everything you heard about asteroid habitats, it’s bullshit. Right now, it’s Mars or an extrasolar planet, and an exoplanet is going to stay out of our reach, barring a dramatic breakthrough in propulsion engineering, for at least fifty years.
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