Narrator in “Unfinished Business”

Mammoths will last another 24,000 years. They are superbly adapted for this cold world. But when it gets warm again, the grassy plains they depend on will disappear. The humans have a different future ahead of them. When change comes, they will be able to deal with it, because they can adapt - and they have the ability to shape the world around them. One day, they'll look back on all this.

[The series ends back in the modern day, with animal skeletons and ice age artifacts on display at a museum]

We have since built museums to celebrate the past, and spent decades studying prehistoric lives. And if all this has taught us anything, it's this: no species lasts forever.