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  • Title: Cardiovascular evidence for an intermediate or higher metabolic rate in an ornithischian dinosaur.
    Author: Fisher PE, Russell DA, Stoskopf MK, Barrick RE, Hammer M, Kuzmitz AA.
    Journal: Science; 2000 Apr 21; 288(5465):503-5. PubMed ID: 10775107.
    Abstract:
    Computerized tomography scans of a ferruginous concretion within the chest region of an ornithischian dinosaur reveal structures that are suggestive of a four-chambered heart and a single systemic aorta. The apparently derived condition of the cardiovascular system in turn suggests the existence of intermediate-to-high metabolic rates among dinosaurs.
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