Building a Planet B for Humanity Isn't a Good Enough Reason to Explore Space
Listen to would-be space explorers for long enough, and eventually they will likely argue that humans must develop outposts on other worlds in case of disaster here on Earth, as a so-called Planet B.
from Space.com https://ift.tt/2KSi1P8
from Space.com https://ift.tt/2KSi1P8
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