Quote:
Originally Posted by InfStorm
The impact would be negligeable so long as fusion technology remains outside of our grasp. We simply do now have the technology required to build interplanetary ships, much less interstellar ships that would survive in the cold reality of space. Radiation, water & air requiremets, and survival of several humans stuck into a small space for an extended period of time are huge hurdles we sill need to resolve first, no matter how many earth-like worlds there are.
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I'm not sure how essential fusion technology is. For that matter, Orion (the 1950's-1960's one) could quite reasonably have gone interplanetary (and maybe interstellar the slooow way) if people were willing to put up with the downsides.