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  • 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.
  • 5 years ago



    Tags : Carl Sagan Quotes , War Quotes , Science Quotes
  • 'What's the use of their having names the Gnat said, 'if they won't answer to them?' 'No use to them,' said Alice; 'but it's useful to the people who name them, I suppose. If not, why do things have names at all?' 'I can't say,' the Gnat replied.
  • 5 years ago



    Tags : Lewis Carroll Quotes , Science Quotes , Names Quotes
  • But the whole vital process of the earth takes place so gradually and in periods of time which are so immense compared with the length of our life, that these changes are not observed, and before their course can be recorded from beginning to end whole nations perish and are destroyed.
  • 5 years ago



    Tags : Aristotle Quotes , Science Quotes , Earth Quotes