Everything in nature is the result of fixed laws.
Charles DarwinRead
I think it inevitably follows, that as new species in the course of time are formed through natural selection, others will become rarer and rarer, and finally extinct. The forms which stand in closest competition with those undergoing modification and improvement will naturally suffer most.
Interpretation
This quote discusses the process of natural selection leading to the extinction of species that cannot adapt.
Charles Darwin highlights the inevitable consequences of natural selection, where as new species evolve and adapt to their environment, those that cannot keep pace will become less common and may ultimately face extinction. This reflects the competitive nature of evolution, where species in direct competition with those evolving will struggle for survival.
In practice
In a biology class discussing evolution, this quote can be used to illustrate the concept of natural selection.
Everything in nature is the result of fixed laws.
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.
I am quite conscious that my speculations run beyond the bounds of true science....It is a mere rag of an hypothesis with as many flaw[s] & holes as sound parts.
We cannot fathom the marvelous complexity of an organic being; but on the hypothesis here advanced this complexity is much increased. Each living creature must be looked at as a microcosm--a little universe, formed of a host of self-propagating organisms, inconceivably minute and as numerous as the stars in heaven.
I have called this principle, by which each slight variation, if useful, is preserved, by the term of Natural Selection.
we are always slow in admitting any great change of which we do not see the intermediate steps
They [scientists of centuries past] call on God only from the lonely and precarious edge of incomprehension. Where they feel certain about their explanations, however, God gets hardly a mention.
It is essential to understand our brains in some detail if we are to assess correctly our place in this vast and complicated universe we see all around us.
Remember that all models are wrong; the practical question is how wrong do they have to be to not be useful.
The man who discovers a new scientific truth has previously had to smash to atoms almost everything he had learnt, and arrives at the new truth with hands blood stained from the slaughter of a thousand platitudes.
String theory has the potential to show that all of the wondrous happenings in the universe - from the frantic dance of subatomic quarks to the stately waltz of orbiting binary stars; from the primordial fireball of the big bang to the majestic swirl of heavenly galaxies - are reflections of one, grand physical principle, one master equation.
Gravity is not a version of the truth. It is the truth. Anyone who doubts it is invited to jump out a tenth-storey window.
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