科学家们发现,近3.8亿年前最早登上陆地的动物有着出人意料的僵硬脖子,这推翻了长期以来关于进化的理论。这种进化并非为了帮助动物……Scientists have discovered that the first animals to venture onto land nearly 380 million years ago had surprisingly stiff necks, overturning a long-standing theory about evolution. Rather than evolving to help animals t