in a dream one must be allowed the liberty of imagining occasionally that which never existed in the world of sense perception. - Carl Sagan

" "

in a dream one must be allowed the liberty of imagining occasionally that which never existed in the world of sense perception.

English
Collect this quote

About Carl Sagan

Carl Edward Sagan (9 November 1934 – 20 December 1996) was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space, the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the hypothesis, accepted since, that the high surface temperatures of Venus can be attributed to, and calculated using, the greenhouse effect. He testified to the US Congress in 1985 that the greenhouse effect will change the earth's climate system.

Biography information from Wikiquote

Also Known As

Native Name: Carl Edward Sagan
Alternative Names: Sagan Carl E. Sagan Carl E Sagan C. E. Sagan C.E. Sagan C E Sagan C. Sagan C Sagan Sagan C Sagan C. Sagan C. E. Sagan CE
Works in ChatGPT, Claude, or Any AI

Add semantic quote search to your AI assistant via MCP. One command setup.

Related quotes. More quotes will automatically load as you scroll down, or you can use the load more buttons.

Additional quotes by Carl Sagan

Part of the success of the tobacco industry in purveying this brew of addictive poisons can be attributed to widespread unfamiliarity with baloney detection, critical thinking, and the scientific method. Gullibility kills.

Жестовете му бяха изразителни и риториката му бе неудържима. Това не беше просто част от работата му. Този разпит, това алтернативно интерпретиране на фактите бе събудило в него някаква неподправена страст. След миг на размисъл, Ели осъзна за какво ставаше дума. Петимата не бяха донесли никакви преки военни приложения, не бяха се върнали с никакъв ликвиден политически капитал, само с един разказ, който изглеждаше повече от странен. И този разказ съдържаше опасни предпоставки. Сега Киц държеше в ръцете си най-унищожителния арсенал на Земята, докато Поддръжниците строяха галактики. Той беше пряк следовник на поредица от държавни водачи, американски и съветски, създали стратегията на ядрената конфронтация, докато Поддръжниците представляваха сплав от различни видове, обитаващи различни светове и работещи в пълен синхрон. Самото им съществуване представляваше мълчалив укор. И после, да си представим възможността тунелът да бъде активиран от другия край и той не може да предотврати това по никакъв начин. Те могат да се появят тук за миг. Как би могъл Киц да защити Съединените щати при подобни обстоятелства? Неговата роля в строителството на Машината — чиято история сега той трескаво се мъчеше да преправи — можеше да се изтълкува от някой враждебно настроен трибунал като неизпълнение на задълженията му. И какъв отчет можеше да даде Киц пред извънземните за това как е опазвал планетата, той и неговите предшественици? Дори и ако през тунела не се изсипеха ангели-отмъстители, ако истината за това пътуване се оповестеше, това щеше коренно да промени света. Той вече се променяше. И щеше все повече да се променя

PREMIUM FEATURE
Advanced Search Filters

Filter search results by source, date, and more with our premium search tools.

"Bumblebees detect the polarization of sunlight, invisible to uninstrumented humans; put vipers sense infrared radiation and detect temperature differences of 0.01C at a distance of half a meter; many insects can see ultraviolet light; some African freshwater fish generate a static electric field around themselves and sense intruders by slight perturbations induced in the field; dogs, sharks, and cicadas detect sounds wholly inaudible to humans; ordinary scorpions have micro — seismometers on their legs so they can detect in darkness the footsteps of a small insect a meter away; water scorpions sense their depth by measuring the hydrostatic pressure; a nubile female silkworm moth releases ten billionths of a gram of sex attractant per second, and draws to her every male for miles around; dolphins, whales, and bats use a kind of sonar for precision echo-location.
The direction, range, and amplitude of sounds reflected by to echo-locating bats are systematically mapped onto adjacent areas of the bat brain. How does the bat perceive its echo-world? Carp and catfish have taste buds distributed over most of their bodies, as well as in their mouths; the nerves from all these sensors converge on massive sensory processing lobes in the brain, lobes unknown in other animals. how does a catfish view the world? What does it feel like to be inside its brain? There are reported cases in which a dog wags its tail and greets with joy a man it has never met before; he turns out to be the long-lost identical twin of the dog's "master", recognizable by his odor. What is the smell-world of a dog like? Magnetotactic bacteria contain within them tiny crystals of magnetite - an iron mineral known to early sailing ship navigators as lodenstone. The bacteria literally have internal compasses that align them along the Earth's magnetic field. The great churning dynamo of molten iron in the Earth's core - as far as we know, entirely unknown to uninstrumented humans - is a guiding reality for

Loading...