标签：pterodactyl 相关文章

SSS 2009-01-13

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. A bird in flight is a thing of beauty. Even their takeoffs and landings usually look effortless. But pterodactyls? Well, thats another story. Scientists

发表于:2019-01-08 / 阅读(74) / 评论(0) 分类 Scientific American(一)月
最新学习文章
热门学习文章