Generate text that refutes this claim: Scientific opinion often changes; evolution may be accepted in the scientific community now, but it could well be rejected in future.  The opinion of the scientific community with regard to facts and theories has a great propensity to change with time. Once scientists adamantly maintained that the Earth was flat. For centuries it also maintained that there were two kinds of blood flowing through the human body. Science is not infallible and the prevailing theory is no more than the opinion currently in vogue among scholars. In light of new evidence, theories can change over time, giving way to better explanations [1] . For this reason, the evolutionists' dogmatic adherence to their position in spite of contrary evidence provided by Creationists is hard to understand. However, it becomes clear why the scientific establishment takes such a confrontational position toward Creationism when one considers that many eminent scientists and researchers have built their careers within the paradigm of evolution, and their research often depends wholly on its acceptance. These scientists would lose their exalted position in the light of a paradigm-shift in scientific understanding away from evolution. It is for this reason that scientists who adhere to established norms so often fight things like Creationism, even though they provide explanations where evolution cannot. For science to progress, these conservative impulses must be fought against, which is why it is essential that when science is taught, so are all the prevailing theories concerning branches of the sciences, including Creationism.  [1] Understanding Science. 2011. “Science Aims to Explain and Understand”. University of California Berkeley.
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Of course scientific opinion changes over time. It does so because the process of scientific enquiry requires the search for new data. Theories are not rigidly adhered to, but are rather accepted when there is evidence for them. When evidence mounts against a theory it is rejected. The examples cited show this very well. The idea that the world was flat was proposed as a theory without proof but by the end of the classical world Pliny was able to say "Every one agrees that it has the most perfect figure. We always speak of the ball of the earth, and we admit it to be a globe bounded by the poles." [1] as scholars had provided evidence of the earth being spherical. This process of change can harm some scientists' careers, but it can also make others. There is no monolithic scientific establishment setting policy, denying younger researchers from exploring new hypotheses and avenues of inquiry. It is clear from this that Creationism is not a science, because it does not change in light of new evidence, but rather dogmatically adheres to its claims in spite of evidence. Science adapts to new information. Creationism is stagnant and intellectual barren.  [1] Pliny the Elder, The Natural History, John Bostock ed., Taylor and Francis 1855.