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.

Carl Sagan

Carl Sagan

American astronomer, astrophysicist, cosmologist, author

9 November 1934 — 20 December 1996

Billions and Billions

Chapter 14


Time of publication: August 31, 2011

Length: 244 characters

Favorited by: 0 member


We use cookies to personalise ads and to analyse our traffic. We also share information about your use of our site with our advertising and analytics partners. By using our site, you accept the use of these cookies. See details