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  • Carl Sagan Quotes   592
  • What does it mean for a civilisation to be a million years old? We have had radio telescopes and spaceships for a few decades; our technical civilisation is a few hundred years old ... an advanced civilisation millions of years old is as much beyond us as we are beyond a bushbaby or a macaque
    • 5 years ago



    Tags : Carl Sagan Quotes , Mean Quotes , Technology Quotes
  • [Science] is not perfect. It can be misused. It is only a tool. But it is by far the best tool we have, self-correcting, ongoing, applicable to everything. It has two rules. First: there are no sacred truths; all assumptions must be critically examined; arguments from authority are worthless. Second: whatever is inconsistent with the facts must be discarded or revised. ... The obvious is sometimes false; the unexpected is sometimes true.
    • 5 years ago



    Tags : Carl Sagan Quotes , Science Quotes , Self Quotes
  • There are huge advertising budgets only when there's no difference between the products. If the products really were different, people would buy the one that's better. Advertising teaches people not to trust their judgment. Advertising teaches people to be stupid.
    • 5 years ago



    Tags : Carl Sagan Quotes , Stupid Quotes , Differences Quotes
  • That we can now think of no mechanism for astrology is relevant but unconvincing. No mechanism was known, for example, for continental drift when it was proposed by Wegener. Nevertheless, we see that Wegener was right, and those who objected on the grounds of unavailable mechanism were wrong.
    • 5 years ago



    Tags : Carl Sagan Quotes , Thinking Quotes , Astrology Quotes
  • The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together. Information distilled over 4 billion years of biological evolution. Incidentally, all the organisms on the Earth are made essentially of that stuff. An eyedropper full of that liquid could be used to make a caterpillar or a petunia if only we knew how to put the components together.
    • 5 years ago



    Tags : Carl Sagan Quotes , Years Quotes , Together Quotes
  • Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the other, with the same female), we might guess that promiscuous societies were uncommon in the immediate human past.
    • 5 years ago



    Tags : Carl Sagan Quotes , Past Quotes , Men Quotes