哺乳动物在恐龙时代经历“爆发式”演化

图片地址：http://n.sinaimg.cn/transform/20150721/lFkE-fxfaswf7943348.jpg

新研究显示，在2亿年前恐龙开始大发展的时候，哺乳动物也经历了一段“演化爆发”的时期。图中是已经灭绝的柱齿兽，这类动物以其独特的臼齿得名，在侏罗纪中期出现了骨骼和牙齿的爆发式演化。 在2亿年前至1...

Sina new research shows that in the age of the dinosaurs, dinosaurs began development in 200 million years ago, mammals also experienced a period of evolution of the "outbreak". The picture is docodon extinct, this kind of animal is named for its unique molars in the Middle Jurassic in the explosive evolution of bones and teeth. In 200 million years ago to 1...