Individual organisms differ, but some of this variation is heritable. Species alive today are descended with modifications from ancestral species that lived in the distant past.
Darwin's observations supported Lyell's theory of ancient earth because he theorized that geology evolves the same way animals did!
accident
Darwin, of course. Lamarck did not have the evidence to back up his acquired characteristics and use and disuse concepts, but Darwin had massive amounts of evidence and well structured arguments for his theory of natural selection.
he didn't have anything to prove
You can easily refute the theory of evolution--just as easily as you can refute Newton's theory of gravity, or Einstein's theory of relativity. You just can't refute these theories using science or evidence with ease, as these theories are extremely well supported. If you could confirm the existence of fossil bunnies in undisturbed Cambrian strata, that would serve as excellent evidence of a fundamental flaw in Darwin's theory. If you could find a natural specie such as Kirk Cameron's crocaduck, evolution could not explain such a chimera, and forces at odds with Darwin's theory would obviously be at play.
Scientists did not prove things then anymore than they prove things now. Evidence, masses of converging evidence support the theory of evolution by natural selection. Darwin, in his day, had much evidence to support his theory. All the way from artificial selection to island biogeography. Since that time the theory has moved on to where it is no longer just Darwin's theory, but modified and supported with so much evidence that the theory became the bedrock of biology. Go here. talkorigins.org
Intelligent design, Hovind Theory Added: The above are not scientific theories but more ideological assertions in nature. No positive evidence supports either assertion.
None exists.
Darwin .
It is not so much the climate, but it is the tectonic plates movement, and fossils of extincted animals on different continents that support this theory. Also, fossils support the theory of evolution that was proven by Charles Darwin.
Individual organisms differ, but some of this variation is heritable. Species alive today are descended with modifications from ancestral species that lived in the distant past.
NO. take Darwin's theory of evolution for example. there is no real evidence, but it is accepted as fact by most in America today.
no he developed evolutionary theory
There is no evidence to suggest that Charles Darwin renounced his theory of evolution before his death. In fact, he continued to write in support of evolutionary ideas and even published a book called "The Descent of Man" in 1871. Darwin's theory of evolution remains one of the most influential and widely accepted scientific theories to this day.
Darwin's theory of evolution by natural selection does not incorporate theories about geological change. Those are the domain of geology, not biology.
It is based on evidence found in the world.
As it is no longer just Darwin's theory we know the mechanisms for change are mutation, gene flow, genetic drift and the one Darwin developed, natural selection.