About 66 million decades in the past, at the end of the Cretaceous period, a mass extinction wiped the nonavian dinosaurs and traveling reptiles from the planet. Right now, crocodilians and birds are the one surviving archosaurs.  母婴 健康 历史 军事 美食 文化 星座 专题 游戏 搞笑 动漫 宠物 无障碍 关怀版The phrase "cro

An interesting simple fact about crocodiles is they don’t just have just one set of tooth; they’re basically repeatedly replaced over the course of their lives in a phenomenon called polyphyodont dentition.Crocodilian teeth differ from dull and rounded to sharp and pointed.[36] Wide-snouted species have tooth that fluctuate in dimension, though