That's very true, it would require huge technology to get to Mars and stay there for any length of time.
Just having to deal with the radiation is huge. Going to the moon is fast so you can have an acceptable dosage. Going to Mars is like 8 months at best, so you'd have to have good protection. And that's just the normal stuff, if there's a solar flare, forget about it. I recall reading that there was no protection enroute to the moon for a flare beyond a specific level, but since it was a "short" trip timewise it was an acceptable risk.
Imagine being involved with projects that size. Wow.
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Uncertainty is an uncomfortable position.
But certainty is an absurd one.
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