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"The sleeping style of each organism is exquisitelyadapted to the ecology of the animal. It is conceivable that animals who are too stupid to be quiet on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep."
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Exlpore more Biology quotes
"Air freshener is man's pitiful attempt to have his food smell as good, after digestion, as they did, before ingestion."
"Consider the Lichen. Lichens are just about the hardiest visible organisms on Earth, but the least ambitious."
"New cells are born everyday and old cells die, but they have neither funerals nor birthdays."
"Individuals are not stable things, they are fleeting. Chromosomes too are shuffled into oblivion, like hands of cards soon after they are dealt. But the cards themselves survive the shuffling. The cards are the genes. The genes are not destroyed by crossing-over, they merely change partners and march on. Of course they march on. That is their business. They are the replicators and we are their survival machines. When we have served our purpose we are cast aside. But genes are denizens of geological time: genes are forever."
Explore more quotes by Carl Sagan
"When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion."
"But if they called everything divine which they do not understand, why, there would be no end of divine beings."
"You could just as well say that an agnostic is a deeply religious person with at least a rudimentary knowledge of human fallibility."
"Major scientific insights are characteristically intuitive, and equally characteristically described in scientific papers by linear analytical arguments. There is no anomaly in this: it is, rather, just as it should be. The creative act has major right-hemisphere components. But arguments on thevalidity of the result are largely left-hemisphere functions."
"With rare exceptions (chiefly the social insects), mammals and birds are the only organisms to devote substantial attention to the care of their young; an evolutionary development that, through the long period of plasticity which it permits, takes advantage of the large information-processing capability of the mammalian and primate brains. Love seems to be an invention of the mammals."
"We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology."
"The time scale for evolutionary or genetic change is very long. A characteristic period for the emergence of one advanced species from another is perhaps a hundred thousand years; and very often the difference in behavior between closely relatedspecies-say, lions and tigers-do not seem very great... But today we do not have ten million years to wait for the next advance. We live in a time when our world is changing at an unprecedented rate. While the changes are largely of our own making, they cannot be ignored. We must adjust and adapt andcontrol, or we perish."
"In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion."
"Science cuts two ways, of course; its products can be used for both good and evil. But there's no turning back from science. The early warnings about technological dangers also come from science."
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