Saturday, 21 July 2007

Evolution : not "just a theory"

When scientists use the word theory, it has a different meaning to normal everyday use.
In science, a theory is not a guess, not a hunch. It's a well-substantiated, well-supported, well-documented explanation for our observations.
Some people think that in science, you have a theory, and once it's proven, it becomes a law. That's not how it works.
A theory never becomes a law. In fact, if there was a hierarchy of science, theories would be higher than laws. There is nothing higher, or better, than a theory.
These explanations are called theories, and will always be theories. They can't be changed into laws, because laws are different things. Laws describe, and theories explain.
Just because it's called a theory of gravity, doesn't mean that it's just a guess.
The Theory of Evolution by Natural Selection is our best explanation for the fact of evolution.
Evolution is not just a theory, it's triumphantly a theory!
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