And a subset of adorable little hoofed mammals even developed into whales.

一部分可爱的小有蹄哺乳动物甚至进化成了鲸鱼。

This was the environment that gave rise to the very first perissodactyls, hoofed mammals with an odd number of toes.

这是产生第一批奇蹄类动物的环境，奇蹄类动物是有奇数个脚趾的有蹄类哺乳动物。

And these comparisons showed that cetaceans are actually most closely related to a group known as artiodactyls, hoofed mammals that includes hippos, pigs, and deer.

这些比较表明，鲸类动物实际上与称为偶蹄类动物的类群关系最密切，偶蹄类动物是有蹄类哺乳动物，包括河马、猪和鹿。

And, the paleontological evidence, the fossil evidence and evidence from looking at the DNA of living whales and other animals now really strongly points to whales being very closely related to hoofed mammals.

古生物学证据、化石证据以及对现代鲸类和其它动物DNA的研究结果现在真的有力地指向鲸类与有蹄类动物的亲缘关系非常接近。