100 Quotes About Biology

If this book has a lesson, it is that we are awfully lucky to be here-and by 'we' I mean every living thing. To attain any kind of life in this universe of ours appears to be quite an achievement. As humans we are doubly lucky, of course: We enjoy not only the privilege of existence but also the singular ability to appreciate it and even, in a multitude of ways, to make it better. It is a talent we have only barely begun to grasp. . Bill Bryson

In every remote corner of the world there are people like Carl Jones and Don Merton who have devoted their lives to saving threatened species. Very often, their determination is all that stands between an endangered species and extinction. But why do they bother? Does it really matter if the Yangtze river dolphin, or the kakapo, or the northern white rhino, or any other species live on only in scientists' notebooks? Well, yes, it does. Every animal and plant is an integral part of its environment: even Komodo dragons have a major role to play in maintaining the ecological stability of their delicate island homes. If they disappear, so could many other species. And conservation is very much in tune with our survival. Animals and plants provide us with life-saving drugs and food, they pollinate crops and provide important ingredients or many industrial processes. Ironically, it is often not the big and beautiful creatures, but the ugly and less dramatic ones, that we need most. Even so, the loss of a few species may seem irrelevant compared to major environmental problems such as global warming or the destruction of the ozone layer. But while nature has considerable resilience, there is a limit to how far that resilience can be stretched. No one knows how close to the limit we are getting. The darker it gets, the faster we're driving. There is one last reason for caring, and I believe that no other is necessary. It is certainly the reason why so many people have devoted their lives to protecting the likes of rhinos, parakeets, kakapos, and dolphins. And it is simply this: the world would be a poorer, darker, lonelier place without them. Mark Carwardine

Thus, by science I mean, first of all, a worldview giving primacy to reason and observation and a methodology aimed at acquiring accurate knowledge of the natural and social world. This methodology is characterized, above all else, by the critical spirit: namely, the commitment to the incessant testing of assertions through observations and/or experiments – the more stringent the tests, the better – and to revising or discarding those theories that fail the test. One corollary of the critical spirit is fallibilism: namely, the understanding that all our empirical knowledge is tentative, incomplete and open to revision in the light of new evidence or cogent new arguments (though, of course, the most well-established aspects of scientific knowledge are unlikely to be discarded entirely).. I stress that my use of the term 'science' is not limited to the natural sciences, but includes investigations aimed at acquiring accurate knowledge of factual matters relating to any aspect of the world by using rational empirical methods analogous to those employed in the natural sciences. (Please note the limitation to questions of fact. I intentionally exclude from my purview questions of ethics, aesthetics, ultimate purpose, and so forth.) Thus, 'science' (as I use the term) is routinely practiced not only by physicists, chemists and biologists, but also by historians, detectives, plumbers and indeed all human beings in (some aspects of) our daily lives. (Of course, the fact that we all practice science from time to time does not mean that we all practice it equally well, or that we practice it equally well in all areas of our lives.) . Alan Sokal

There were long stretches of DNA in between genes that didn't seem to be doing very much; some even referred to these as "junk DNA, " though a certain amount of hubris was required for anyone to call any part of the genome "junk, " given our level of ignorance. Francis S. Collins

A god who is capable of sending intelligible signals to millions of people simultaneously, and of receiving messages from all of them simultaneously, cannot be, whatever else he might be, simple. Such Bandwidth! Richard Dawkins

Among all the occurrences possible in the universe the a priori probability of any particular one of them verges upon zero. Yet the universe exists; particular events must take place in it, the probability of which (before the event) was infinitesimal. At the present time we have no legitimate grounds for either asserting or denying that life got off to but a single start on earth, and that, as a consequence, before it appeared its chances of occurring were next to nil.. Destiny is written concurrently with the event, not prior to it.. The universe was not pregnant with life nor the biosphere with man. Our number came up in the Monte Carlo game. Is it surprising that, like the person who has just made a million at the casino, we should feel strange and a little unreal?. Jacques Monod

The conclusion of intelligent design flows naturally from the data itself–not from sacred books or sectarian beliefs. Inferring that biochemical systems were designed by an intelligent agent is a humdrum process that requires no new principles of logic or science. It comes simply from the hard work that biochemistry has done over the past forty years, combined with consideration of the way in which we reach conclusions of design every day. Michael J. Behe

There's no obvious reason to assume that the very same rare properties that allow for our existence would also provide the best overall setting to make discoveries about the world around us. We don't think this is merely coincidental. It cries out for another explanation, an explanation that... points to purpose and intelligent design in the cosmos. Unknown

Will it be possible to solve these problems? It is certain that nobody has thus far observed the transformation of dead into living matter, and for this reason we cannot form a definite plan for the solution of this problem of transformation. But we see that plants and animals during their growth continually transform dead into living matter, and that the chemical processes in living matter do not differ in principle from those in dead matter. There is, therefore, no reason to predict that abiogenesis is impossible, and I believe that it can only help science if the younger investigators realize that experimental abiogenesis is the goal of biology. Jacques Loeb

The complexity of the simplest known type of cell is so great that it is impossible to accept that such an object could have been thrown together suddenly by some kind of freakish, vastly improbable, event. Such an occurrence would be indistinguishable from a miracle. Michael Denton

Molecular biology has shown that even the simplest of all living systems on the earth today, bacterial cells, are exceedingly complex objects. Although the tiniest bacterial cells are incredibly small, weighing less than 10-12 gms, each is in effect a veritable micro-miniaturized factory containing thousands of exquisitely designed pieces of intricate molecular machinery, made up altogether of one hundred thousand million atoms, far more complicated than any machine built by man and absolutely without parallel in the nonliving world. Michael Denton

Real arms races are run by highly intelligent, bespectacled engineers in glass offices thoughtfully designing shiny weapons on modern computers. But there's no thinking in the mud and cold of nature's trenches. At best, weapons thrown together amidst the explosions and confusion of smoky battlefields are tiny variations on old ones, held together by chewing gum. If they don't work, then something else is thrown at the enemy, including the kitchen sink - there's nothing "progressive" about that. At its usual worst, trench warfare is fought by attrition. If the enemy can be stopped or slowed by burning your own bridges and bombing your own radio towers and oil refineries, then away they go. Darwinian trench warfare does not lead to progress - it leads back to the Stone Age. . Michael J. Behe

Before you can ask 'Is Darwinian theory correct or not?', You have to ask the preliminary question 'Is it clear enough so that it could be correct?'. That's a very different question. One of my prevailing doctrines about Darwinian theory is 'Man, that thing is just a mess. It's like looking into a room full of smoke.' Nothing in the theory is precisely, clearly, carefully defined or delineated. It lacks all of the rigor one expects from mathematical physics, and mathematical physics lacks all the rigor one expects from mathematics. So we're talking about a gradual descent down the level of intelligibility until we reach evolutionary biology. David Berlinski

Even if we have a reliable criterion for detecting design, and even if that criterion tells us that biological systems are designed, it seems that determining a biological system to be designed is akin to shrugging our shoulders and saying God did it. The fear is that admitting design as an explanation will stifle scientific inquiry, that scientists will stop investigating difficult problems because they have a sufficient explanation al . William A. Dembski

Constrained optimization is the art of compromise between conflicting objectives. This is what design is all about. To find fault with biological design - as Stephen Jay Gould regularly does - because it misses some idealized optimum is therefore gratuitous. Not knowing the objectives of the designer, Gould is in no position to say whether the designer has proposed a faulty compromise among those objectives. . William A. Dembski

Molecular machines display a key signature or hallmark of design, namely, irreducible complexity. In all irreducibly complex systems in which the cause of the system is known by experience or observation, intelligent design or engineering played a role in the origin of the system... We find such systems within living organisms. Scott A. Minnich

Was intelligence an inevitability, a consequence of evolution? Bacteria succeeded without a brain, possessing survival skills that rivaled their biological hosts. So why should a creature of higher intelligence expect to do better? Humans were on the verge of being replaced by their hybrid creations. How intelligent was that? Todd Crawshaw

There is nothing ideal in Nature, because it was not created by some sort of ideal Almighty Being with perfect peerless craftsmanship. Nature as it is, has evolved through millions of years out of the biological drive for survival. Abhijit Naskar

Sorgan tried his very best not to think about how long it must have taken for a stream that small to eat its way down through solid rock to form its current bed. Sorgan knew exactly what the word “hundred” meant, but when numbers wandered off toward “thousand”–or even “million”–and the people who used those terms were talking about years, Sorgan’s mind shied back in horror. David Eddings

Inside a jihadi brain, the neuropsychological elements of aggression and rage run rampant, due to socio-political conditions. These overwhelming mental elements of young souls, when attached to the sacred texts of the Quran, by the authoritarian groups of fundamentalists, become weapons of mass destruction in the pursuit of the exclusive supremacy of one religion over the others. Abhijit Naskar

All the so-called philosophical notion of “love without attachment” or “detached love” are biologically non-existent on this planet. We humans are biologically designed through millions of years of evolution to grow attachment. Love cannot survive without attachment. Abhijit Naskar

Few pretty and privileged young women really understand the essential injustice of biology.. For most of her life as a woman, the rules were perfectly clear cut: other women were the enemy, and all love was war. She had rejected feminism, quite openly, as a crutch for the envious and ugly, and regarded married women as holding the upper hand if, unlike her own mother, they had any strength of character. The weaknesses and dependencies imposed by fecundity had never entered into her calculations. . Amanda Craig

Golden Ratio is a powerful mathematical constant woven into the very fabric of biology. It is the unique visual tension between comforting symmetry and compelling asymmetry, and its thoughtful application can bring beauty and harmony and intrigue to all manner of designed things. Darrin Crescenzi

Marian’s eyes absolutely blaze. To meet them is to have a shock of contact as if they were electrically charged. “Now you see? You wondered what was in whale’s milk. Don’t you know now? The same thing that’s in a mushroom spore so small you need a microscope to see it, or in gophers, or poison oak, or anything else we try to pave under or grub out, or poison. There isn’t good life and bad life, there’s only life. Think of the force down there, just telling things to get born! . Wallace Stegner

This had not endeared him to exobiologists such as Dr Perera, who took exactly the opposite view. To them, the only purpose of the Universe was the production of intelligence, and they were apt to talk sneeringly about purely astronomical phenomena, 'Mere dead matter' was one of their favourite phrases. Arthur C. Clarke

Very often ambition and entrepreneurial drive, in combination, beat brilliance. Edward O. Wilson

In biology, nothing is clear, everything is too complicated, everything is a mess, and just when you think you understand something, you peel off a layer and find deeper complications beneath. Nature is anything but simple. Unknown

We biologists often use the phrase “Mother Nature” to refer to the entire system of Nature that we see around us, but it is not really an entity, and it does not have any real concern for any of its living creatures — it lives on with or without us; it is in our human psychology to impose a human-like identity upon any grand system that we encounter around us — it gives us a sense of closeness to that system and makes us feel an essential part of it. When I say, Mother Nature designed us, or programmed us, I am simply referring to the process of natural selection. Abhijit Naskar

They say blood is thicker than water. It's also more treacherous, prone to betrayal, full of shit and quite honestly, I wouldn't put much weight into it at all. Ashly Lorenzana

The externalization of memory [via the use of external symbolic storage systems] has altered the actual memory architecture within which humans think, which is changing the role of biological memory, the way in which the human brain deploys its resources, and the form of modern culture. Merlin Donald

I told my three sons stories about germs more than fifty years ago as fanciful bedtime tales. Arthur Kornberg

The emotional mind likewise transcends the facile and appealing dualism separating its psychological and biological aspects. Physical mechanisms produce one’s experience of the world. Experience, in turn, remodels the neurons whose chemoelectric messages create consciousness. Selecting one strand of that eternal braid and assigning it primacy is the height of capriciousness. (168) Thomas Lewis

It is my belief that the basic knowledge that we're providing to the world will have a profound impact on the human condition and the treatments for disease and our view of our place on the biological continuum. J. Craig Venter

[On scientist Carl Friedrich Gauss][Carl Friedrich] Gauss told his friend Rudolf Wagner, a professor of biology at Gottingen University, that he did not believe in the Bible but that he had meditated a great deal on the future of the human soul and speculated on the possibility of the soul being reincarnated on another planet. Evidently, Gauss was a Deist with a good deal of skepticism concerning religion. Gerhard Falk

All the more recent work on alkaptonuria has... strengthened the belief that the homogentisic acid excreted is derived from tyrosine, but why alkaptonuric individuals pass the benzene ring of their tyrosine unbroken and how and where the peculiar chemical change from tyrosine to homogentisic acid is brought about, remain unsolved problems. Archibald E. Garrod

Belief begins where science leaves off and ends where science begins. Unknown

The curious fact is that biology tells us nothing about desire. And, when you think about it, culture -- novels, movies, opera, and quite a lot of painting -- is about desire, how we manage desire, how we suffer from it, and how it brings us joy when we get things right. A story without desire -- and that means without the insistence of desire -- will be empty, dry, and more or less aimless. That is one reason we read novels, to see how people fall into awkward moral situations and then try to extricate themselves. This is why there is so much anguish in the world: frustrated desire is every bit as miserable as poverty, because desire is no respecter of one’s position in life: everyone goes through it. Peter Watson

Every hour of your life that ticks by, there are numerous points and moments when you can choose to pause - and be aware of your mental and physical state. At any given point, you can freeze the flow that is your life, and be fully conscious for a moment. Kevin Michel

The more you learn the biology behind your every action, emotion and behavior, the better you become at accepting others the way they are. Abhijit Naskar

The evolutionists, piercing beneath the show of momentary stability, discovered, hidden in rudimentary organs, the discarded rubbish of the past. They detected the reptile under the lifted feathers of the bird, the lost terrestrial limbs dwindling beneath the blubber of the giant cetaceans. They saw life rushing outward from an unknown center, just as today the astronomer senses the galaxies fleeing into the infinity of darkness. As the spinning galactic clouds hurl stars and worlds across the night, so life, equally impelled by the centrifugal powers lurking in the germ cell, scatters the splintered radiance of consciousness and sends it prowling and contending through the thickets of the world. . Loren Eiseley

I find it far more awesome, wonderful, that creation; our appearance in the world; should be the culmination, or at least one of the latest products of 3, 000 Million years of organic evolution, than a kind of country trick, taking a rib out of a man's side in a trance. David Attenborough

Not only in antiquity but in our own times also laws have been passed..to secure good conditions for workers; so it is right that the art of medicine should contribute its portion for the benefit and relief of those for whom the law has shown such foresight..[ We] ought to show peculiar zeal..in taking precautions for their safety. I for one have done all that lay in my power, and have not thought it beneath me to step into workshops of the meaner sort now and again and study the obscure operations of mechanical arts. Bernardino Ramazzini

Plants can be affected by stray voltage and they may show stunted growth, deformed growth, or go dormant. In extreme cases they may die. Steven Magee

There is a time and place for electromagnetic shielding and I regard it as a last resort due to the long term biological problems that I have observed with it over the years in plant growth experiments. Steven Magee

I personally cannot discern a shred of evidence for ‘[intelligent] design.’ If 97% of all creatures have gone extinct, some plan isn't working very well! Irven Devore

My own experience of over 60 years in biomedical research amply demonstrated that without the use of animals and of human beings, it would have been impossible to acquire the important knowledge needed to prevent much suffering and premature death not only among humans but also among [other] animals. Albert Sabin

Scholarship that is indifferent to human suffering is immoral. Richard Levins

What a mistake that had been, to create a construct [AI] that could suffer. He knew that now. Life, pain, death, they were no playthings. Biology was serious business, not for amateurs and foolish gods. David Marusek

Suddenly I realized that a cell's life is controlled by the physical and energetic environment and not by its genes. Genes are simply molecular blueprints used in the construction of cells, tissues, and organs. The environment serves as a "contractor" who reads and engages those genetic blueprints and is ultimately responsible for the character of a cell's life. It is a single cell's "awareness" of the environment, not its genes, that sets into motion the mechanisms of life. . Bruce H. Lipton

When General Genius built the first mentar [Artificial Intelligence] mind in the last half of the twenty-first century, it based its design on the only proven conscious material then known, namely, our brains. Specifically, the complex structure of our synaptic network. Scientists substituted an electrochemical substrate for our slower, messier biological one. Our brains are an evolutionary hodgepodge of newer structures built on top of more ancient ones, a jury-rigged system that has gotten us this far, despite its inefficiency, but was crying out for a top-to-bottom overhaul. Or so the General genius engineers presumed. One of their chief goals was to make minds as portable as possible, to be easily transferred, stored, and active in multiple media: electronic, chemical, photonic, you name it. Thus there didn't seem to be a need for a mentar body, only for interchangeable containers. They designed the mentar mind to be as fungible as a bank transfer. And so they eliminated our most ancient brain structures for regulating metabolic functions, and they adapted our sensory/motor networks to the control of peripherals. As it turns out, intelligence is not limited to neural networks, Merrill. Indeed, half of human intelligence resides in our bodies outside our skulls. This was intelligence the mentars never inherited from us.. The genius of the irrational... We gave them only rational functions -- the ability to think and feel, but no irrational functions.. Have you ever been in a tight situation where you relied on your 'gut instinct'? This is the body's intelligence, not the mind's. Every living cell possesses it. The mentar substrate has no indomitable will to survive, but ours does. Likewise, mentars have no 'fire in the belly, ' but we do. They don't experience pure avarice or greed or pride. They're not very curious, or playful, or proud. They lack a sense of wonder and spirit of adventure. They have little initiative. Granted, their cognition is miraculous, but their personalities are rather pedantic. But probably their chief shortcoming is the lack of intuition. Of all the irrational faculties, intuition in the most powerful. Some say intuition transcends space-time. Have you ever heard of a mentar having a lucky hunch? They can bring incredible amounts of cognitive and computational power to bear on a seemingly intractable problem, only to see a dumb human with a lucky hunch walk away with the prize every time. Then there's luck itself. Some people have it, most don't, and no mentar does. So this makes them want our bodies.. Our bodies, ape bodies, dog bodies, jellyfish bodies. They've tried them all. Every cell knows some neat tricks or survival, but the problem with cellular knowledge is that it's not at all fungible; nor are our memories. We're pretty much trapped in our containers. . David Marusek

Consciousness is the chronic pain of life, and all higher organisms suffer it every waking moment. David Marusek

We need science education to produce scientists, but we need it equally to create literacy in the public. Man has a fundamental urge to comprehend the world about him, and science gives today the only world picture which we can consider as valid. It gives an understanding of the inside of the atom and of the whole universe, or the peculiar properties of the chemical substances and of the manner in which genes duplicate in biology. An educated layman can, of course, not contribute to science, but can enjoy and participate in many scientific discoveries which as constantly made. Such participation was quite common in the 19th century, but has unhappily declined. Literacy in science will enrich a person's life. Hans Bethe

If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course of untold millions of years, give origin to the human race. Herbert Spencer

..on opening the incubator I experienced one of those rare moments of intense emotion which reward the research worker for all his pains: at first glance I saw that the broth culture, which the night before had been very turbid was perfectly clear: all the bacteria had vanished.. as for my agar spread it was devoid of all growth and what caused my emotion was that in a flash I understood: what causes my spots was in fact an invisible microbe, a filterable virus, but a virus parasitic on bacteria. Another thought came to me also, If this is true, the same thing will have probably occurred in the sick man. In his intestine, as in my test-tube, the dysentery bacilli will have dissolved away under the action of their parasite. He should now be cured. Unknown

Life for me is just a result of experiments being performed by far more developed creatures. Hasil Paudyal

In microbiology the roles of mutation and selection in evolution are coming to be better understood through the use of bacterial cultures of mutant strains. Edward Tatum

No existing form of anthropoid ape is even remotely related to the stock which has given rise to man. Henry Fairfield Osborn

Perhaps if zoologists would contemplate the wide variations presented by many plants of indubitably one and the same species, and the still wider diversities of long cultivated races from an original stock, they would find more than one instructive parallel to the case of the longest domesticated of all species, man. Asa Gray

Man is a product of nature, a part of the Universe. The Universe is operated under exact natural laws. Man is a product of millions of years of evolution. He adapts himself to the laws of nature or he perishes. James Hervey Johnson

One of my friends compared me to Bruce Banner, due to my work with radiation and human health. So I looked up Bruce Banner and this is what I found: Banner, a physicist, is sarcastic and seemingly very self-assured when he first appears in Incredible Hulk #1, but is also emotionally withdrawn in most fashions.. Banner is considered one of the greatest scientific minds on Earth, possessing "a mind so brilliant it cannot be measured on any known intelligence test." He holds expertise in biology, chemistry, engineering, physiology, and nuclear physics. Steven Magee

It is, however, a most astonishing but incontestable fact, that the history of the evolution of man as yet constitutes no part of general education. Indeed, our so-called 'educated classes' are to this day in total ignorance of the most important circumstances and the most remarkable phenomena which Anthropogeny has brought to light. Ernst Haeckel

Originally, the atoms of carbon from which we’re made were floating in the air, part of a carbon dioxide molecule. The only way to recruit these carbon atoms for the molecules necessary to support life–the carbohydrates, amino acids, proteins, and lipids–is by means of photosynthesis. Using sunlight as a catalyst the green cells of plants combine carbon atoms taken from the air with water and elements drawn from the soil to form the simple organic compounds that stand at the base of every food chain. It is more than a figure of speech to say that plants create life out of thin air. . Michael Pollan

For who could better describe the eye than God, Who made it? But as it is clearer than the day that God has left a good deal to our own efforts .. we should really follow in these things the thread of nature, by which first principles, reason and daily experience lead us. Therefore, He prompts the minds of great men to inquire into the nature which He created, and He furthers and conducts their studies. These things must be enough to us, and from Holy Scripture we should seek in the first place only those things which are necessary to salvation. . Georg Joachim Rheticus

Stephen Hawking said that his quest is simply "trying to understand the mind of God". Stephen Hawking

I am perhaps more proud of having helped to redeem the character of the cave-man than of any other single achievement of mine in the field of anthropology. Henry Fairfield Osborn

All interpretation or observation of reality is necessarily fiction. In this case, the problem is that man is a moral animal abandoned in an amoral universe and condemned to a finite existence with no other purpose than to perpetuate the natural cycle of the species. It is impossible to survive in a prolonged state of reality, at least for a human being. We spend a good part of our lives dreaming, especially when we're awake. As I said, pure biology. Unknown

My practice as a scientist is atheistic. That is to say, when I set up an experiment I assume that no god, angel or devil is going to interfere with its course; and this assumption has been justified by such success as I have achieved in my professional career. I should therefore be intellectually dishonest if I were not also atheistic in the affairs of the world. J.B.S. Haldane

Who gave the decisive deathblow to the argument from design on the basis of biological complexity? Both philosophers and biologists are divided on this point (Oppy 1996; Dawkins 1986; Sober 2008). Some have claimed that the biological design argument did not falter until Darwin provided a proper naturalistic explanation for adaptive complexity; others maintain that David Hume had already shattered the argument to pieces by sheer logical force several decades earlier, in his Dialogues Concerning Natural Religion (Hume 2007 [1779]). Elliott Sober has been among the philosophers who maintain that, as Hume was not in a position to offer a serious alternative explanation of adaptive complexity, it is hardly surprising that 'intelligent people strongly favored the design hypothesis' (Sober 2000, 36). In his most recent book, however, Sober (2008) carefully develops what he thinks is the most charitable reconstruction of the design argument, and proceeds to show why it is defective for intrinsic reasons (for earlier version of this argument, see Sober 1999, 2002). Sober argues that the design argument can be rejected even without the need to consider alternative explanations for adaptive complexity (Sober 2008, 126): 'To see why the design argument is defective, there is no need to have a view as to whether Darwin’s theory of evolution is true' (Sober 2008, 154). Maarten Boudry

I simply would not accede to being forced into this, and would frequently be kept out of classes because of irreverent comments and mocking this religious stuff. Frankly, it stayed with me to this day. In fact, don't get me going. I'm almost as bad as Richard Dawkins on this issue. Richard E. Leakey

Considering the way the prebiotic soup is referred to in so many discussions of the origin of life as an already established reality, it comes as something of a shock to realize that there is absolutely no positive evidence for its existence. Michael Denton

The question of the position of man, as an animal, has given rise to much disputation, with the result of proving that there is no anatomical or developmental character by which he is more widely distinguished from the group of animals most nearly allied to him, than they are from one another. Thomas Henry Huxley

Every day, hundreds of observations and experiments pour into the hopper of the scientific literature. Many of them don't have much to do with evolution - they're observations about the details of physiology, biochemistry, development, and so on - but many of them do. And every fact that has something to do with evolution confirms its truth. Every fossil that we find, every DNA molecule that we sequence, every organ system that we dissect, supports the idea that species evolved from common ancestors. Despite innumerable possible observations that could prove evolution untrue, we don't have a single one. We don't find mammals in Precambrian rocks, humans in the same layers as dinosaurs, or any other fossils out of evolutionary order. DNA sequencing supports the evolutionary relationships of species originally deduced from the fossil record. And, as natural selection predicts, we find no species with adaptations that only benefit a different species. We do find dead genes and vestigial organs, incomprehensible under the idea of special creation. Despite a million chances to be wrong, evolution always comes up right. That is as close as we can get to a scientific truth. Jerry A. Coyne

The fundamental biological variant is DNA. That is why Mendel's definition of the gene as the unvarying bearer of hereditary traits, its chemical identification by Avery (confirmed by Hershey), and the elucidation by Watson and Crick of the structural basis of its replicative invariance, are without any doubt the most important discoveries ever made in biology. To this must be added the theory of natural selection, whose certainty and full significance were established only by those later theories. Jacques Monod

An irrefutable proof that such single-celled primaeval animals really existed as the direct ancestors of Man, is furnished according to the fundamental law of biogeny by the fact that the human egg is nothing more than a simple cell. Ernst Haeckel

The ancestors of the higher animals must be regarded as one-celled beings, similar to the Amoebae which at the present day occur in our rivers, pools, and lakes. The incontrovertible fact that each human individual develops from an egg, which, in common with those of all animals, is a simple cell, most clearly proves that the most remote ancestors of man were primordial animals of this sort, of a form equivalent to a simple cell. When, therefore, the theory of the animal descent of man is condemned as a 'horrible, shocking, and immoral' doctrine, tho unalterable fact, which can be proved at any moment under the microscope, that the human egg is a simple cell, which is in no way different to those of other mammals, must equally be pronounced 'horrible, shocking, and immoral. Ernst Haeckel

..if an organised body is not in the situation and circumstances best adapted to its sustenance and propagation, then, in conceiving an indefinite variety among the individuals of that species, we must be assured, that, on the one hand, those which depart most from the best adapted constitution, will be the most liable to perish, while, on the other hand, those organised bodies, which most approach to the best constitution for the present circumstances, will be best adapted to continue, in preserving themselves and multiplying the individuals of their race. James Hutton

A century ago, people laughed at the notion that we were descended from monkeys. Today, the individuals most offended by that claim are the monkeys. Jacob M. Appel

An evolutionary perspective of our place in the history of the earth reminds us that Homo sapiens sapiens has occupied the planet for the tiniest fraction of that planet's four and a half thousand million years of existence. In many ways we are a biological accident, the product of countless propitious circumstances. As we peer back through the fossil record, through layer upon layer of long-extinct species, many of which thrived far longer than the human species is ever likely to do, we are reminded of our mortality as a species. There is no law that declares the human animal to be different, as seen in this broad biological perspective, from any other animal. There is no law that declares the human species to be immortal. Richard E. Leakey

As long as museums and universities send out expeditions to bring to light new forms of living and extinct animals and new data illustrating the interrelations of organisms and their environments, as long as anatomists desire a broad comparative basis human for anatomy, as long as even a few students feel a strong curiosity to learn about the course of evolution and relationships of animals, the old problems of taxonomy, phylogeny and evolution will gradually reassert themselves even in competition with brilliant and highly fruitful laboratory studies in cytology, genetics and physiological chemistry. William King Gregory

More about the selection theory: Jerne meant that the Socratic idea of learning was a fitting analogy for 'the logical basis of the selective theories of antibody formation': Can the truth (the capability to synthesize an antibody) be learned? If so, it must be assumed not to pre-exist; to be learned, it must be acquired. We are thus confronted with the difficulty to which Socrates calls attention in Meno [ .. ] namely, that it makes as little sense to search for what one does not know as to search for what one knows; what one knows, one cannot search for, since one knows it already, and what one does not know, one cannot search for, since one does not even know what to search for. Socrates resolves this difficulty by postulating that learning is nothing but recollection. The truth (the capability to synthesize an antibody) cannot be brought in, but was already inherent. Niels Kaj Jerne

An example of such emergent phenomena is the origin of life from non-living chemical compounds in the oldest, lifeless oceans of the earth. Here, aided by the radiation energy received from the sun, countless chemical materials were synthesized and accumulated in such a way that they constituted, as it were, a primeval “soup.” In this primeval soup, by infinite variations of lifeless growth and decay of substances during some billions of years, the way of life was ultimately reached, with its metabolism characterized by selective assimilation and dissimilation as end stations of a sluiced and canalized flow of free chemical energy. R.W. Van Bemmelen

This view, as a rounded whole and in all its essential elements, has very recently disappeared from science. It died a royal death with Agassiz.[It had formerly been held that there were no genetic connections among species.] Asa Gray

Evolution is a blind giant who rolls a snowball down a hill. The ball is made of flakes–circumstances. They contribute to the mass without knowing it. They adhere without intention, and without foreseeing what is to result. When they see the result they marvel at the monster ball and wonder how the contriving of it came to be originally thought out and planned. Whereas there was no such planning, there was only a law: the ball once started, all the circumstances that happened to lie in its path would help to build it, in spite of themselves. Mark Twain

Evolution is the law of policies: Darwin said it, Socrates endorsed it, Cuvier proved it and established it for all time in his paper on 'The Survival of the Fittest.' These are illustrious names, this is a mighty doctrine: nothing can ever remove it from its firm base, nothing dissolve it, but evolution. Mark Twain

I have been scientifically studying the traits and dispositions of the “lower animals” (so-called, ) and contrasting them with the traits and dispositions of man. I find the result profoundly humiliating to me. For it obliges me to renounce my allegiance to the Darwinian theory of the Ascent of Man from the Lower Animals; since it now seems plain to me that that theory ought to be vacated in favor of a new and truer one, this new and truer one to be named the Descent of Man from the Higher Animals. Mark Twain

I fully agree with all that you say on the advantages of H. Spencer's excellent expression of 'the survival of the fittest.' This, however, had not occurred to me till reading your letter. It is, however, a great objection to this term that it cannot be used as a substantive governing a verb; and that this is a real objection I infer from H. Spencer continually using the words, natural selection.( Letter to A. R. Wallace July 1866) . Charles Darwin

Natural selection is not the wind which propels the vessel, but the rudder which, by friction, now on this side and now on that, shapes the course. Asa Gray

Animals have genes for altruism, and those genes have been selected in the evolution of many creatures because of the advantage they confer for the continuing survival of the species. Lewis Thomas

An attempt to study the evolution of living organisms without reference to cytology would be as futile as an account of stellar evolution which ignored spectroscopy. J.B.S. Haldane

Indeed, not all attacks–especially the bitter and ridiculing kind leveled at Darwin–are offered in good faith, but for practical purposes it is good policy to assume that they are. Hans Selye

Living organisms were not independently created, but have descended and diversified over time from common ancestors. And thus, no other biological theory so elegantly explains this. Evolutionary theory has withstood the test of time–by way of vicarious experimentation, observation, analysis, and relentless criticism, though opposing viewpoints still cling to the concept of "design." As a person of the biological sciences, I cannot subscribe to such misguided notions that suggest static biological states. Clearly, proper examination of the natural world reveal evolutionary trajectories–some random, others nonrandom–and all having observable genetic implications. It is only when we apply evolutionary explanations to living systems that it becomes ever so clear. The world was not specifically designed with us in mind, but rather we long since adapted and conformed to our surroundings, only giving it the illusionary appearance of "design. Tommy Rodriguez

The uniformity of the earth's life, more astonishing than its diversity, is accountable by the high probability that we derived, originally, from some single cell, fertilized in a bolt of lightning as the earth cooled. It is from the progeny of this parent cell that we take our looks; we still share genes around, and the resemblance of the enzymes of grasses to those of whales is a family resemblance. Lewis Thomas

When in 1863 Thomas Huxley coined the phrase 'Man's Place in Nature, ' it was to name a short collection of his essays applying to man Darwin's theory of evolution. The Origin of Species had been published only four years before, and the thesis that man was literally a part of nature, rather than an earthy vessel charged with some sublimer stuff, was so novel and so offensive to current metaphysics that it needed the most vigorous defense. Half the civilized world was rudely shocked, the other half skeptically amused. Nearly a century has passed since the Origin shattered the complacency of the Victorian world and initiated what may be called the Darwinian revolution, an upheaval of man's ideas comparable to and probably exceeding in significance the revolution that issued from Copernicus's demonstration that the earth moves around the sun. The theory of evolution was but one of many factors contributing to the destruction of the ancient beliefs; it only toppled over what had already been weakened by centuries of decay, rendered suspect by the assaults of many intellectual disciplines; but it marked the beginning of the end of the era of faith. Homer W. Smith

Evolution on the large scale unfolds, like much of human history, as a succession of dynasties. Edmund Beecher Wilson