Last Call: Say You're Lion To Me

(CNN) -- As you will see in our TED talk, Beverly and I have spent enough time in the bush with lions to understand that we have a problem -- rapidly declining big cat populations.

The real miracle is that we do still have this last remnant of lions at all. Just 50 years ago there were 450,000; today there are possibly as few as 20,000. These are the last lions. 

Editor's note: TED is a nonprofit organization devoted to "Ideas worth spreading," which it makes available through talks posted on its website. Beverly and Dereck Joubert, who are National Geographic explorers in residence based in Botswana, have filmed and photographed wildlife and nature for nearly 30 years. They have received five Emmys, as well as other awards. 

Two experts in the field  are saying we could see the last of the lions in our lifetime.  This video is sobering and sad.  I honestly had no idea the numbers had dwindled down to this degree.