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Carl Sagan

"The secrets of evolution, are time and death. There's an unbroken thread that stretches from those first cells to us."

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"The secrets of evolution, are time and death. There's an unbroken thread that stretches from those first cells to us."

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Donna Grant

"The human body when kept in an indoor environment of low lux light will not realize that it is daytime, as it cannot sense the increasing levels of daylight that the genetics are accustomed to. As such, by late morning your body may start sending a signal for you to sleep!"

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Personal Development

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Donna Grant

"The secrets of evolution, are time and death. There's an unbroken thread that stretches from those first cells to us."

Author Name

Personal Development

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Donna Grant

"Consider the Lichen. Lichens are just about the hardiest visible organisms on Earth, but the least ambitious."

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Personal Development

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Donna Grant

"Wanna know the truth about yourself and this universe? Just learn to understand your DNA code then you'll see."

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Personal Development

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Donna Grant

"To understand how growth, aging and death works, you must understand the radiation environment."

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Personal Development

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Donna Grant

"The chicken is only an egg's way for making another egg."

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Personal Development

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Donna Grant

"Genetic code is a divine writing."

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Personal Development

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Donna Grant

"Human beings are ultimately nothing but carriers-passageways- for genes. They ride us into the ground like racehorses from generation to generation. Genes don't think about what constitutes good or evil. They don't care whether we are happy or unhappy. We're just means to an end for them. The only thing they think about is what is most efficient for them."

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Personal Development

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Donna Grant

"The reason as to why a human cannot give birth to himself is because he needs someone to help him. We are altricial, or helpless at birth, because we have to depend on others so that later in life when we are capable, we help those in need. And this is very much part of the circle of life."

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Personal Development

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Donna Grant

"For the female of the species is more deadly than the male."

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Personal Development

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Carl Sagan
"An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God. I know of no such compelling evidence. Because God can be relegated to remote times and places and to uptime causes, we would have to know a great deal more about the Universe than we do now to be sure that no such God exists. To be certain of the existence of God and you be certain of the nonexistence of God seem to me to be the confident extremes in a subject so riddled with doubt and uncertainty as to inspire very little confidence indeed."

Philosophy

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Carl Sagan
"We are all flawed and creatures of our times. Is it fair to judge us by the unknown standards of the future?"

Ethics

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Carl Sagan
"And despite the insignificance of the instant we have so far occupied in cosmic time, it is clear that what happens on and near Earth at the beginning of the second cosmic year will depend very much on the scientific wisdom and the distinctly human sensitivity of mankind."

Responsibility

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Carl Sagan
"[In] everyday life, it is very rare that we are confronted with new facts about events of long ago. Our memories are almost never challenged. They can, instead, be frozen in place, no matter how flawed they are, or become a work in continual artistic revision."

Memory

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Carl Sagan
"Neuroanatomy, political history, and introspection all offer evidence that human beings are quite capable of resisting the urge to surrender to every impulse of reptilian core of brain."

Science

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Carl Sagan
"You squeeze the eyedropper, and a drop of pond water drips out onto the microscope stage. You look at the projected image. The drop is full of life - strange beings swimming, crawling, tumbling; high dramas of pursuit and escape, triumph and tragedy. This is a world populated by beings far more exotic than in any science fiction movie..."

Science

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Carl Sagan
"A typical chromosomal DNA molecule in a human being is composed of about five billion pairs of nucleotides. But since there are four different kinds of nucleotides, the number of bits of information in DNA is four times the number of nucleotide pairs. Thus if a single chromosome has five billion (5 X 10^9) nucleotides, it contains twenty billion (2 X 10^10) bits of information. We also see that if more than some tens of billions (several times 10^10) of bits of information are necessary for human survival, extragenetic systems will have to provide them: the rate of development of genetic systems is so slow that no source of such additional biological information can be sought in the DNA."

Science

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Carl Sagan
"We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces."

Power

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Carl Sagan
"Skeptical scrutiny is the means, in both science and religion, by which deep thoughts can be winnowed from deep nonsense."

Science

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Carl Sagan
"Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out."

History

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