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Scientists test ideas about chemical evolution by using computer models.
The vast majority of scientists support evolution. There is no longer any debate in the scientific community about whether evolution occurs, only the mechanisms in which evolution acts upon is debated.
The overwhelming majority of scientists accept the theory of evolution by natural selection. Any scientists that do not accept the theory usually do so for religious reasons.
Biologists.
It gives them something to study.
Evolution
Different scientists hold different beliefs. Many scientists accept the theory of evolution as a scientific explanation for the diversity of life on Earth. However, there are also scientists who believe in theistic evolution, which posits that evolution is a process guided by a higher power, such as God. Ultimately, beliefs about the origins of humans vary among scientists.
Virtually all of the scientists in life-science related fields, and most of the rest.
The fossil record
By selective breeding.
Evolution
Scientists have believed that chemical evolution occurred about 4 billion years ago, shortly after the formation of the Earth. This process is thought to have led to the development of the first life forms on our planet.