| Creationists are usually more careful about distinguishing between microevolution and macroevolution at this point. |
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| Evolutionary biologists debate fiercely about how macroevolutionary change emerges from microevolution. |
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| The creation science folks accept microevolution but not macroevolution. |
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| Instead, they say that macroevolution is nothing more than microevolution played out over long periods. |
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| They accept such explanations for many events in what is known as microevolution, or horizontal evolution in my terminology, the process whereby diversity is generated within a fundamentally unchanged body plan. |
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| These outcomes of evolution are distinguished based on time scale as macroevolution versus microevolution. |
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| In general, macroevolution is regarded as the outcome of long periods of microevolution. |
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| Applied to the development of science, this view implies that revolutions determine the overall shape, while ordinary scientific work applies the adaptive microevolution. |
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| For Darwin, macroevolution is just microevolution aggregated over long periods of time and space. Gould goes on to chart the fate of Darwin's ideas. |
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