大多数人心中的恐龙是一种身型巨大、生性残暴、已经灭绝的爬行动物,但这也存在一定误解。尽管它们是地球历史上最大的陆生动物,但许多恐龙其实比火鸡还小。“飞”到现代的恐龙称霸地球达1.75亿年之久的恐龙最早出现于2.47亿至2.4亿年前,但除祖鸟类恐龙外,其余恐龙皆在6550万年前悉数灭绝。科学家尚未就恐龙灭绝的原因达成一致,但可能的原因包括小行 Most dinosaurs in the hearts of people is a huge, raw cruel, already extinct reptiles, but there are some misunderstandings. Although they are the largest terrestrial animals in the history of the earth, many dinosaurs are actually smaller than turkeys. “Fly ” to the modern dinosaurs to dominate the earth 175 billion years old dinosaurs first appeared in 147 million to 240 million years ago, except for the ancestral dinosaurs, the remaining dinosaurs all extinct 65.5 million years ago. Scientists have yet to agree on the reasons for the extinction of the dinosaurs, but possible causes include small ones