It is very difficult to evolve by altering the deep fabric of life — any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
It is very difficult to evolve by altering the deep fabric of life — any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
It is very difficult to evolve by altering the deep fabric of life — any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
It is very difficult to evolve by altering the deep fabric of life — any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
It is very difficult to evolve by altering the deep fabric of life — any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
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It is very difficult to evolve by altering the deep fabric of life

— any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones.
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carl sagan dragons of eden: speculations on the evolution of human intelligence

More “Carl sagan” Quotes

Ten long trips around the sun since I last saw that smile, but only joy and thankfulness that on a tiny world in the vas — Ann Druyan
The Cosmos is all that is or was or ever will be. Our feeblest contemplations of the Cosmos stir us -- there is a tingli — Carl Sagan, Cosmos
We are star stuff harvesting sunlight. — Carl Sagan
Science is not only compatible with spirituality — it is a profound source of spirituality.
It takes a fearless, unflinching love and deep humility to accept the universe as it is. The most effective way he knew — Ann Druyan
The idea that God is an oversized white male with a flowing beard, who sits in the sky and tallies the fall of every spa — Carl Sagan
Atheism is more than just the knowledge that gods do not exist, and that religion is either a mistake or a fraud. Atheis — Emmett F. Fields
My main reason for scepticism about the Huxley/Sagan theory is that the human brain is demonstrably eager to see faces i — Richard Dawkins, The Greatest Show on Earth: The Evidence for Evolution
Those at too great a distance may, I am well are, mistake ignorance for perspective. — Carl Sagan, Dragons of Eden: Speculations on the Evolution of Human Intelligence
I am convinced that there are genuine and valid levels of perception available with cannabis (and probably with other dr — Lester Grinspoon, Marihuana Reconsidered
Every now and then, I'm lucky enough to teach a kindergarten or first-grade class. Many of these children are natural-bo — Carl Sagan, The Demon-Haunted World: Science as a Candle in the Dark
And what greater might do we possess as human beings than our capacity to question and to learn? — Ann Druyan