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Explain how we know that organisms that lived millions of years ago are related to the organisms of today.

User Rickard
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We know this because of fossils and because of Darwin. He discovered fossils and found out that some organisms came through natural selection. Which is an organism adapting to its environment
User Nidonocu
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This is because of fossils. Scientists are able to trace bone structures of past animals that are dead to animals of now and see similarities and like factors
User Natsume
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