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The first two videos clarify some basic concepts of evolution and natural selection. They should help you better to understand the remaining videos, which deal with How Scientists Know.
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The remaining videos emphasize How Scientists Know that evolution occurs, and that natural selection is actually capable of producing highly organized and complex beings from random genetic and environmental variation.
If you have read How Scientists Know About Genes, you already know about one of the most powerful tools for establishing and sorting out evolutionary relationships: comparing gene sequences and using them to build phylogenetic trees. If you have not read it, do so before continuing this page.
This page emphasizes other, non-genetic kinds of evidence that evolution happens.
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