And the sub species of the white rhino known as the northern white rhino is now just two animals away from complete extinction and both of the living ones are females.

白犀牛的亚种被称为“北白犀牛”，现在只剩下两只，它们濒临灭绝，活着的两只犀牛都是雌性。

They saw two planets collide with extreme force creating what scientists say would've been a complete mass extinction if there was any kind of life on either planet.

他们看到两颗行星以极强的力量相撞，造成了科学家所说的如果任何一颗行星上有任何生命都可能发生的大规模灭绝。