How do we know things about the past? Whether in history or in the natural sciences, it involves working with surviving data and using deductive reasoning and logical inference.
Dennis Venema has been blogging about “Genomes as Ancient Texts.” In the latest installment, he provides diagrams illustrating how scientists deduce that two organisms are related in a particular way. Here’s one example:
Click through to read the rest of Vennema’s post. And I recommend circulating it to people you may know who do not understand what the evidence for evolution is and why it is so persuasive.