ナショナルジオグラフィックのインスタグラム(natgeo) - 3月26日 09時42分

Photo @tbfrost | This might look like a chicken embryo but it is in fact a saltwater crocodile embryo , photographed in the Northern Territory of Australia. I will post an adorable video by @melissalesh of Baby hatchling saltwater crocodiles in the wild on my profile @tbfrost. The reason that a chicken embryo and crocodile embryo look so similar is that crocodiles and birds are very closely related, both share a common ancestor: the archosaur. What is even cooler though is that scientists can see crocodiles have changed very little since the time of dinosaurs whereas birds have evolved considerably. Crocs really are the world's great survivors! For more photos and videos of crocodiles, follow @tbfrost. Photo made on assignment for National Geographic Society grant project on crocodiles.

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