Quote by: Carl Sagan

A central lesson of science is that to understand complex issues (or even simple ones), we must try to free our minds of dogma and to guarantee the freedom to publish, to contradict, and to experiment. Arguments from authority are unacceptable.


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Author Bio


  • NameCarl Sagan
  • DescriptionAmerican astrophysicist, cosmologist, author and science educator
  • BornNovember 9, 1934
  • DiedDecember 20, 1996
  • CountryUnited States Of America
  • ProfessionCosmologist; Astrophysicist; Novelist; Planetary Scientist; Space Scientist; Popularizer Of Science; Science Fiction Writer; Science Writer
  • Awards; Pulitzer Prize For General Non-Fiction; Humanist Of The Year