Carl Sagan Quotes

The Family Tree Of Each Of Us Is Graced By All Those Great Inventors: The Beings Who First Tried Out Self-replication, The Manufacture Of Protein Machine Tools, The Cell, Cooperation, Predation, Symbiosis, Photosynthesis, Breathing Oxygen, Sex, Hormones, Brains, And All The Rest-inventions We Use, Some Of Them, Minute-by-minute Without Ever Wondering Who Devised Them And How Much We Owe To These Unknown Benefactors, In A Chain 100 Billion Links Long.

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