We have saved the Gray Wolf and the California Condor from extinction, and now there numbers are plenty. But there are still thousands of other species that are in danger of extinction.

Historically, choosing which animals and plants we help has been decided mostly by whether we like them or not. A new series from National Geographic, the Last of the Last, looks at our relationship to endangered animals, and how we help them. 

We’ll talk to Christine Dell’Amore, an editor with National Geographic.com.