"Somewhere, something incredible is waiting to be known."
"Chlorine is a deadly poison gas employed on European battlefields in World War I. Sodium is a corrosive metal which burns upon contact with water. Together they make a placid and unpoisonous material, table salt. Why each of these substances has the properties it does is a subject called chemistry."
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Source: Carl Sagan (1979). “Broca's brain: reflections on the romance of science”, Random House Inc
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