Behind the Scenes: Choosing the Winners of the 2015 National Geographic Photo Contest

Earlier this week, National Geographic announced this year’s winners of its prestigious photo contest. After receiving 13,000 entries, the three judges — photo editor Jessie Wender and photographers David Guttenfelder and Anand Varma — had to come to an agreement on a single grand prize winner and the winner of the three categories (people, places, and nature).

The short video above is a behind-the-scenes look at how the winners were selected. You can see the winning shots in this gallery we published.