Carl Sagan
No other planet in the solar system is a suitable home for human beings; it's this world or nothing. That's a very powerful perception.
More quotes and aphorisms
Once we accept our limits, we go beyond them...To a father growing old...If patience is worth anything, it must endure...Science and technology are a propellant for building...The trouble with the rat race is that even if you win...Every day you waste is one you can never make up...
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