• Some scientists argue that feathered dinosaurs evolved flight from the ground up, flapping their feathered arms as they ran.

    一些研究者认为羽毛恐龙是从零开始进化飞行能力它们在奔跑中会拍动自己带羽毛前肢

    article.yeeyan.org

  • Some scientists argue that feathered dinosaurs evolved flight from the ground up, flapping their feathered arms as they ran.

    一些研究者认为羽毛恐龙是从零开始进化飞行能力它们在奔跑中会拍动自己带羽毛前肢

    article.yeeyan.org

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