Evolution A Fact and a Theory

One of the most common sources of confusion for people trying to understand evolution is the question of whether it's a fact or a theory. Here's the answer: It's both. The fact of evolution refers to the things scientists can see and measure. The theory of evolution refers to the intellectual framework science has developed to explain the underlying processes that account for those facts.

To help you understand how evolution can be both a fact and a theory, I talk about another natural process that is both fact and theory: gravity. And because a key to understanding anything you hear or read about evolution requires being familiar with scientific principles, I also offer a short and sweet explanation of how scientists think.

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