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Why are birds considered dinosaurs? What characteristics do birds have that non-avian (not a bird) theropod dinosaurs had?​

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User Filoche
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1 Answer

8 votes

Answer:

Fossil evidence also demonstrates that birds and dinosaurs shared features such as hollow, pneumatized bones, gastroliths in the digestive system, nest-building and brooding behaviors.

Step-by-step explanation:

answered
User Andriy B
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