Hans Adolf Krebs Quotes

The concept of evolution postulates that living organisms have common roots, and in turn, the existence of common features is powerful support for the concept of evolution.

Evolution isn't true, because if we evolved from monkeys, how can they still be here?

The study of evolution is an evolution in itself.

The Theory of Evolution has had over a million chances to be wrong, but never has been.

Our young people - and adults - should be aware that considerable dissent exists in the scientific world regarding the validity of molecules-to-man evolution.

I accept extinction as best explaining disjoined species. I see that the same cause must have reduced many species of great range to small, and that it may have reduced large genera to so small, and of families.

Evolution is a theory, and it's a theory that you can test. We've tested evolution in many ways. You can't present good evidence that says evolution is not a fact.

Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how complex organisms like birds, and flowers, and human beings came into existence in the first place.

You can't even begin to understand biology, you can't understand life, unless you understand what it's all there for, how it arose - and that means evolution.

Nothing in biology makes sense except in the light of evolution.

The Theory of Evolution has been proved true

The facts of evolution are clear and are not disputed by any serious scientific worker. The universe is over 11 billion years old, and the earth, in particular, is over 4 billion. That is a fact. Life on earth is at least 2.5 billion years old, and, as new evidence accumulates, the best estimate of the origin of life gets pushed further and further into the past. That too is fact. It is also a fact that there were no mammals or birds 200 million years ago and no vertebrates 600 million years ago, while there are no dinosaurs now. Finally, it is a fact that under con- ditions that have existed on earth for the last billion years, at least, all living organisms arise from previously living organisms. So, the present complex living forms have evolved by an unbroken and continuous process from the simplest living forms of the pre-Cambrian era. To as- sert, on the contrary, that the earth and life on it are a paltry ten or hundred thousand years old and that the complex forms living today arose in an instant from unorganized matter is in contradiction not simply with the corpus of biological knowledge but with all scientific knowl- edge of the physical world. To deny evolution is to deny physics, chemistry, and astronomy, as well as biology

The theory of evolution is quite rightly called the greatest unifying theory in biology. The diversity of organisms, similarities and differ- ences between kinds of organisms, patterns of distribution and behavior, adaptation and interaction, all this was merely a bewildering chaos of facts until given meaning by the evolutionary theory.

The creationists repeatedly assert that evolution is a theory, and, indeed, not a scientific theory at all because it is unable to predict future developments. Both statements are untrue. Evolution [phenomenon] is a fact, not theory. It once was a theory but today, as a consequence of observation and testing it is probably the best authenticated actu- ality known to science. There are theories concerning the mechanisms of evolution but no competent student doubts the reality of evolution

The business of proving evolution has reached a stage when it is futile for biologists to work merely to discover more and more evidence of evolution. Those who choose to believe that God created every biological species separately in the state we observe them but made them in a way calculated to lead us to the conclusion that they are the products of an evolutionary development are obviously not open to argument.

Is evolution a theory, a system, or an hypothesis? It is much more: it is a general condition to which all theories, all hypotheses, all systems must bow and which they must satisfy henceforward if they are to be thinkable and true.

Evolution is a tinkerer.

We know evolution happened because innumerable bits of data from myriad fields of science conjoin to paint a rich portrait of life's pilgrimage.

A probing analysis of the problems of evolution forms the basis of my prose.

There is no controversy within science over the core proposition of evolutionary theory.

Evolution has long been the target of illogical arguments that use presumption.

The stupendous time spans of the evolutionary past are now part of common culture (though maybe not in the United States Bible Belt, nor in parts of the Islamic world). Most people are at ease with the idea that our present biosphere is the outcome of four billion years of Darwinian evolution.

I have a strong feeling that the subject of evolution is beautiful without the excuse of creationists needing to be bashed.

The first and most important reason for its elimination is the unquestioned fact that evolution is not a science; it is a hypothesis only, a speculation.

I encourage people who don't believe in evolution to look for horses in Jurassic Solenhofen limestone.