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[quote]yes there is[/quote] show me!
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We have observed change in species in fruit flies, we have observed ring species in salamanders and finches, human chromosome 2, tailbones, fossils, viruses, and a lot more. Adaption does not stop in a species. Over time these adaptations make the species far too different from what it was originally was, making them not able to have offspring with each other making them by definition a new species.