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| Re: [Future] MSNBC debates if the Earth is actually flat (658903) | |||
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Re: [Future] MSNBC debates if the Earth is actually flat |
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Posted by Easy on Thu Sep 2 20:47:39 2010, in response to Re: [Future] MSNBC debates if the Earth is actually flat, posted by Chris R16/R2730 on Thu Sep 2 17:34:36 2010. The only way to elevate evolution from theory to fact is to catalog it as it takes place, over time.But it's just a theory This is such a common complaint about evolution that it deserves a page of it's own. This comment is born out of misuse of the word theory. People who make statements like: "But it's only a theory; it's not a scientific law," or "It's a theory, not a fact," don't really know the meanings of the words their using. Theory does not mean guess, or hunch, or hypothesis. A theory does not change into a scientific law with the accumulation of new or better evidence. A theory will always be a theory, a law will always be a law. A theory will never become a law, and a law never was a theory. The following definitions, based on information from the National Academy of Sciences, should help anyone understand why evolution is not "just a theory." A scientific law is a description of an observed phenomenon. Kepler's Laws of Planetary Motion are a good example. Those laws describe the motions of planets. But they do not explain why they are that way. If all scientists ever did was to formulate scientific laws, then the universe would be very well-described, but still unexplained and very mysterious. A theory is a scientific explanation of an observed phenomenon. Unlike laws, theories actually explain why things are the way they are. Theories are what science is for. If, then, a theory is a scientific explanation of a natural phenomena, ask yourself this: "What part of that definition excludes a theory from being a fact?" The answer is nothing! There is no reason a theory cannot be an actual fact as well. For example, there is the phenomenon of gravity, which you can feel. It is a fact that you can feel it, and that bodies caught in a gravitational field will fall towards the center. Then there is the theory of gravity, which explains the phenomenon of gravity, based on observation, physical evidence and experiment. Albert Einstein's General Theory of Relativity replaced the less accurate gravity theory of Sir Isaac Newton, which was the first complete mathematical theory formulated which described a fundamental force. There is the modern theory of evolution, neo-darwinism. It is a synthesis of many scientific fields (biology, population genetics, paleontology, embryology, geology, zoology, microbiology, botany, and more). It replaces darwinism, which replaced lamarckism, which replaced the hypotheses of Erasmus Darwin (Charles' grandfather), which expanded the ideas of Georges de Buffon, which in turn expanded upon the classification of Karl von Linne. (see also: Darwin's Precursors and Influences) So there is the theory of evolution. Then there is the FACT of evolution. Species change-- there is variation within one kind of animal. There is a predictable range of genetic variation in a species, as well as an expected rate of random mutations. Creationists readily admit that a "kind" (an ambiguous, non-scientific term) can develop into different species (i.e. a dog "kind" can evolve into wolves, coyotes, foxes, and all types of domestic dogs) but they insist that it must stop there. They never give any reason for this fabricated limitation-- they just deny that it can happen. They just can't accept macroevolution, because it contradicts the "truth" of their dogma. But in reality, there is no limit to the degree that a species can change. Given enough time, a fish-like species can evolve into a amphibian-like species, an amphibian-like species can evolve into a reptilian-like species, a reptilian-like species can evolve into a mammalian-like species, and an ape-like species can evolve into the modern human species. |
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