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On this episode of ID the Future Casey Luskin continues his examination of Nature's "15 Evolutionary Gems" packet, going through the literature on small-scale, micro-evolutionary changes -- and how they fail to account for larger, macro-evolutionary changes.

Listen in as Luskin discusses changes in birds' beaks and guppies' spots and what they really tell us about evolutionary theory.

For more on the "evolutionary gems," Check out Evolution News & Views.

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