Nat Geo photographer talks mission to document every species in captivity04:04
National Geographic photographer and “The Photo Ark” author Joel Sartore talks to Craig Melvin about his mission to document the more than 12,000 captive animal species around the world — one photo at a time. For more on “The Photo Ark,” visit natgeophotoark.org.
Maria Shriver: Katherine Schwarzenegger’s dog makes me a happy 'grandmother'03:42
How to train your puppy: Expert trainer shares tips03:23
TODAY puppy Sunny has his very own plush01:28
Watch: Very dapper dog fills role of best ring bearer ever00:34
Sunny and his siblings celebrate 1st birthday together04:57
St. Louis Zoo using new tech to help elephants lose weight01:50