"National boundaries are not evident when we view the earth from space. Fanatic ethnic or religious or national identifications are a little difficult to support when we see our planet as a fragile blue crescent, fading to become an inconspicuous point of light..." Carl Sagan

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[–]jet199 3 insightful - 3 fun3 insightful - 2 fun4 insightful - 3 fun -  (1 child)

Many of Carl Sagan's Best selling books are now out of print, not even on ebook, because too many people prefer to live in darkness and fear than have to take responsibility.

Many of the problems we have in the world now we found the answers to long ago but if we don't keep the information available then we are going to have to work to find those answers again every generation rather than moving on and progressing.

[–][deleted] 2 insightful - 2 fun2 insightful - 1 fun3 insightful - 2 fun -  (0 children)

just means we need to build huge walls, if they're big enough to be seen from space it will be safe to assume they are pretty strong and sturdy and will last.